First of all, international nurses most of the time do not rely on H1B visa, they get Green Cards sponsored. Second of all, I used to live in the USA but not as a student so I have a good idea on what is possible and what is not. You can do internships and work off campus when you ask for special permission. You can also have many amazing on campus jobs. Also, dont forget I have a home country to go back to if things should not work out. I have a goal and you dont reach goals by thinking they dont work out.

Furthermore, being a student in germany does not mean you are not limited, I am limited there as well, the maximum I can earn without paying high taxes is 800 Euros, I wouldnt get a loan for anything nor a nice flat or apartment, so I can directly go where I actually want to be.

Also, not everyone is supposed to live in their home country just because it seems "better" there on paper. I could go to Mexico and be happy af without a lot of money instead of being miserable on 800 Euros pension per month with cold weather in Germany. People are different. What means security to you means limitation to the other person.