It is easier for politicians to do nothing, safer and ensures future election win. If someone would say anything serious about inviting those scientists, then his opponents would immediately capitalize on this by shouting from every paid tiktok shill, how he is taking European's jobs and inviting bad immigrants.
China has an enormous and rapidly growing AI space. I would argue growing much, much faster than the US space where in a lot of cases the hustle has replaced the engineering (see: OpenAI).
No, they aren't all working in the USA, and in many cases those that were are leaving the US and moving back to China.
You only see the ones working in the USA and not the ones working in China. The USA still pays better than China, and has more stomach for immigration (for now…Trump is working on making that worse), but when I was working in Beijing a lot of engineers from Japan, Korea, Taiwan, were there specifically for the higher pay.
You seem to be frustrated about Romania (which has an east but not a formal eastern region designation as in Eastern Europe - are you conflating the two?) - but can you elaborate on your frustration?
https://euraxess.ec.europa.eu/jobs#european-funding-initiati...