I have dealt with a lot of Asians over the years; had relationships with them, met them on planes, in their own countries, had relationships with them. A great number of them want to travel abroad. A great number of them are ignorant about the journey upon which they will embark. Their ignorance stems from the fact:
1. They have little knowledge of Western society - the failings of their schools perhaps, or simply because there are many countries, and assumptions are likely about countries and opportunities.
2. They are misled by migration agents/brokers and friends, whose context is often very different. We all want to offer encouragement, but sometimes we do it in half-measure, so people leave for a foreign nation, and end up disappointed. Migration agents make money by placing you in other countries, after which point, they have been paid, and you are poorly positioned to take legal action against them. They might not be well-regulated, because governments have protected themselves, and they care little about you.
3. Their qualifications not reecognised. A great many Asians have qualifications in their own country which are not recognised. This places them in a difficult situation in their host country. If you are Japanese or Korean, maybe you can get a job in the host country's major cities because there are many tourists from your home country. Otherwise, without high English standards or local degree, you will surely struggle to find job. Do you want to end up in a dead-end job selling trickets to tourists. You can do that in the developing world.
4. Learning English - It is expensive to study in the West; they charge you a premium as a foreigner to get a 'gold plate' accredited degree, and then yon need to study a vocational course. Why bother? You are starting from behind, with a Western debt legacy.
5. Find a partner - Maybe you hope to meet a Western guy/girl. The problem is that you will encounter a great many insincere partners who just want to have sex. A cultural distinction can be a point of interest however, but the question is whether the partners have identified the fundamental differences in their values. Soon they might be confronting an inter-racial custody battle for children, and you are at a disadvantage in a legal system you cannot afford, understand, or count upon for support.
6. Finding a job - It can take years to find a job. Unless your vocation is in demand, it can take years, and even they they might prejudicially give you the low-challenge jobs, or maybe your education is not recognised or as good. So from the start, you seem to struggling with challenges that no one else has to contend with.
7. Support for immigrants is often lacking. The welfare system was not designed for you; you don't have the same support as 'locals', even though you pay taxes. Having said this, many Asian communities have community groups to support their local migrant population, and they are a great source of support. If they are strong, they can aid to ensure government policy is fair.
8. Expensive services in the West. You will pay high rent in the West; with little hope of ever being able to afford a house given that they are sold at 10x annual earnings; and with your poor English, maybe it will take you 30 years to get a house, and you will pay 50% of your income in rent. Schooling is expensive, and maybe you need to support family at home.
There is another element with NZ. Immigration is hard...but its harder in NZ because:
1. Levels of prejudice are high. NZ polls suggest that most NZ'ers do not want immigration. The reason is that they are sensitive to seeing their cultural values change. They likely their traditional English values. They were always an illusion; since they dishonestly kept the details of their dubious Christian lives from others, so we never knew the worst of it. This is not always bad. The fact that NZ'ers are prejudicial means that some go out of their way to show they are different, i.e. They will recommend you for jobs, whether you deserve it or not, and sometimes because you deserve it, and they want to try hard to accommodate you. Sometimes its because they pragmatically want more population in NZ.
2. Low growth. In NZ there are not so many jobs, incomes are low by Western standards, and the population is small and isolated. People are asset-rich but income poor; particularly in those depopulating rural towns. The inflow of immigrants is scarcely high enough to offset the outflow of migrants each year, and some of those migrants are people who have migrated to NZ, and decided that matters in NZ are so bad that they want to go home. Surprisingly, its actually the people who are doing best in NZ who are the ones going abroad; usually to Australia, but often to their home countries, Singapore or the USA, where some also have relatives. Life is too hard in NZ; particularly if you have children. Crime is relatively high on the North Island, and property prices is high too. You might end up being a slave for another person's dream. Choose well! A late change of plans is expensive. Do you want to pay a 2nd set of costs to move again, and then have to make new friends, buy new furniture, start your career again; another set of visa application fees, twice has high as NZ (at least in Australia). You will come to feel like an economic slave. Think well before migrating. Many people go back home, losing a great deal of money on forex rates, currency conversion, opportunity costs, shipping.
We all have a bitter taste about our own countries; their decline in values. Anywhere in the world looks better than our own place. Sometimes you need to fight for what you believe where your message is strongest - in your own country - making use of existing relationships. The most important things in life are best achieved in your home country:
3. Internal (housing) environment
4. External environment
Only this last one is better in the West because of the legacy of prosperity. But the most important elements are best in your own country. If you want the best, find the best in your country; don't migrate to the ends of the earth; its a false dream; migrate to somewhere where you will be appreciated. i.e. Your big cities are rich in culture and prosperity, and they will rapidly emerge. Within a few decades you will be able to holiday in the West, and you might not even want to.