I dont think the reddit ideology is necessarily the thing that will stop people as much as the language barrier. We learn European languages growing up and they use mostly the same script so it’s easier for people to imagine moving to Europe. I think Korea is interesting in that sense too because Hangul is pretty easy to learn even if the Korean language itself is not. So I have heard of a bunch of (non Korean) techies moving out there too. Being able to read and write a language even if speaking is difficult for you makes life in another country infinitely easier. If teaching Chinese was more common in schools i bet wed see more migration intrest

Even if educated people start moving to other global north countries, that's still a problem for the US. Meanwhile, it's also worth remembering that a lot of people in STEM are immigrants to the US from the global south. They may leave the west entirely and go back to their home countries where there is growing demand for their skills. Meanwhile, China has already largely caught up in terms of education. Chinese universities are taking top spots in global ranking, China is now producing both higher quantity and quality of research than the US, and China has far more STEM graduates. I'd argue we've already hit the inflection point where Chinese technological progress is outpacing the US in most areas.

If you're looking to get out fast, and you only speak English, where do you go that isn't fascist? Genuine question