This is just me, might not be representative, but as an indian CS graduate, I was willing to move to the US temporarily if it meant I could make FIRE money and return to India and basically chill out and work at interesting jobs without worrying about needing MNC/unicorn money to live well. I saw broadly two ways to do this - the startup scene, and the ridiculously high new grad salaries (which would enable FIRE in india after a few years) in the US back in early 2020s - when I was graduating. By the time I finished though, those salaries dried up like you are saying, and startup exits are easier in Blore these days and I can get funding from the usual bunch by just domiciling in Spore like flipkart did. Note that I did not expect the current AI bubble to last this long. Potentially could have cashed out on that. My impression is that if you know nvcc exists, you get money thrown at you in the US today... All in all, the idea fizzled out. Among my peers too, the people who went there for the usual M.S at a UC --> california job market pipeline are all people who are sure they want to settle in the US long-term, through the visa troubles and all. Others didn't go.
Point is, those high salaries were a big draw to a lot of people here including me. And in the absence of that companies now need to move here to get access to the same people. I think it is happening, unicorns/GCCs here are now paying quite well. I mean I had almost the median EU tech salary ($60K - 52LPA) for india cost of living at my _starting job_. So without the US starting salary being 150K-200K (a salary unattainable in india anywhere) like it was 5 years ago, it's a hard sell. Senior salaries are still high of course, but if you have to stay there 10+ years, you have a family there, kids there, loans there, and it is basically committing to settling in the US. Meaning that without the added security of the backup plan "return and you're either FIRE or super comfortable", its much more of a commitment to move. My circles have a selection bias of course, and for people who did not manage to get top 10% salaries here, the risk/reward is completely different.