It's true that in some Chinese cultures cheating the system is how things are done, but this doesn't apply to other Asian cultures. Japanese people for example are very respectful of others and culturally are much less likely to bend the rules when compared to natural born Australians, so you can't really lump them all into one bucket as there are huge differences between them.
Very few Asians are refugees. A refugee is someone who escapes their homeland because their life is in danger, and is allowed to settle in a new country without meeting the normal requirements for citizenship. International students paying for a plane ticket and going back home a few years later when they're finished studying don't even come close to the definition of refugee. Have you gone through a university campus carpark recently? There are so many Asian students driving BMWs and other expensive cars because their families are rich, and that's why they are able to study abroad. Why would they want to live here when back home their family is powerful and politically connected?
While they are here they pay GST and other taxes just like everyone else. Again, just look at COVID when the annual influx of international students stopped - companies went bust and white Australians lost their jobs because there weren't enough people coming into the country and buying their stuff.
True refugees may well be a drain on society while they get back on their feet, but Asians sure don't count in that. I'd be interested to know where you got the stats showing how many refugees are Asian? I can't find any stats on refugees, only on which countries migrants come from and that says this year the most came from India, followed by China, New Zealand and the UK.
What other cultures would you prefer on our streets instead of Asians? I guess you'd rather we change the law to allow burqas and mandate all food be halal as per Islamic law, so we can get more Muslims in to replace all the Asians? No thanks, I like the fact that whatever country Asian people are from, they are happy to follow the laws we have and not try to change them.
The charge controllers are likely fine (I am going to put some into practice soon, but full disclosure I haven't yet) however as with most products from Chinese sellers their stats are a little too optimistic. Most Western countries will build a safety buffer in to their products (so a 10 amp controller will work all day at 10 amps, and maybe up to 11 or 12 amps) whereas a Chinese 10 amp controller can probably only peak at 10 amps for a few seconds with additional cooling, and may die prematurely if it sits over 6-7 amps for too long. You see the same thing with inverters - western ones are sold by their continuous rating, like "500 W (1 kW peak)" whereas Chinese ones sell by the peak rating it can only reach for a second or two at a time, like "1 kW inverter" and then in the fine print buried in the listing "500 W continuous rating". Occasionally there are exceptions but these seem to be mistakes, as the majority of stuff is advertised with the biggest and best numbers even if they aren't really reachable.
So as long as you're aware of this and you over-spec everything by a good safety margin then you should be ok. This is assuming you choose a product that is genuine, and not a fake such as a 10 amp controller with a 30 amp sticker on it, of course.
If you're relatively new to solar and don't know exactly what you want and how to figure out whether your Isc is within limits, the Voc has a good safety margin to not blow up the controller, etc. then you may find it cheaper to buy from a local company, because although you will pay more you should only have to buy once. If you go with Aliexpress you may have to buy three or four different models until you find one that works the way you want, and then quickly go back and buy more of them before they change the internals. Fine if you're building a bunch of larger systems with dozens of controllers, but it will probably work out more expensive for a small system with only one charge controller total.