I prefer to believe otherwise. In the words of the Desiderata¹

You are a child of the universe no less than the trees and the stars; you have a right to be here.

¹- https://www.desiderata.com/desiderata.html

US-type capitalism is a high-level concept though. The right of an individual to exist - existence in effect being its own justification - is such a lower level concept, that something so lofty as capitalism can’t really have any bearing on the issue.

It’s not a question of whether capitalism allows our existence - it’s very obviously the other way around.

The U.S capitalist system / democracy does not try to guarantee the existence of its members ? That's a dark take. It could do a much better job but I think there's at least a minimal, some would say sufficient, effort made to support the existence of members of society.

> The world does not owe you the right to exist

I mean thats just nature. Darwin etc.

Maybe you should try the DPRK?