No your concerns are valid, its just that you clearly don't know what life is like in America for the have-nots. You see rich people on social media, in movies and TV. You think it would just be a bit harder than how you have it now. You don't even think about what it would be like to be unemployed; an American is deathly afraid of losing their job. That means they won't be able to pay rent, they won't be able to see a doctor, they won't be able to afford to eat. There's a social safety net, sure, it's just not a very good one. Lot's of people die in America all the time of preventable causes, many who would be in your position, just because they didn't "pull themselves up by their bootstraps" or whatever.

No, look, Europe is almost caste-based in how rigid the social hierarchies have become due to the immensity of the social-welfare programs. They'll keep you alive and comfortable but you'll never have the autonomy of the ultra-wealthy who galavant around Vienna and drive fancy cars and fly all over the world. Let me tell you something: its better to have good public education, good public healthcare, and good public infrastructure than to drive a fancy car. Still, you feel like you're not truly free, because you aren't really. But Americans aren't more free than you either, even if they appear to you to be. You're just looking in the wrong place for your freedom.