I think that's perhaps -- perhaps! -- true of US citizens who live in the US and have seen their research funding evaporate. I'm not a scientist, but if my job prospects in the US started getting really grim, I would still have a hard time leaving my home to work elsewhere. But I'd probably at least consider it.
But non-citizens, especially those who are being pushed to self-deport (or worse)...? I feel like something like this will be an easy sell for them.