You can do all those things while also not supporting FAANG

Depends. If you can find another employer that's more ethical (which is not guaranteed just because they're smaller) and pays as much with as flexible a work schedule, yeah, you should probably do that. Otherwise it might indeed be necessary.

I don't know, are we doing concequentialist ethics here, or deontological? I feel like we've reached the level of splitting hairs where we need to decide. For the purpose of actual advice people reading might follow, I'd say just try and be a good person, and don't let perfect be the enemy of better.