I always wanted to work in the US simply because I've been growing up with a part of the culture since the internet existed and because the pay seems to be better.
I feel only people who've been working on both sides can comment the situation to answer the question: should I be careful what I wish for here? (aka better pay, experiencing US culture)
I believe more people are in my situation.
Granted she would likely work more hours and have far less vacation. American work culture, especially in big tech, puts the company over personal obligations or personal well being. Do consider that trade off.