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.
There is a vast spectrum between US-style neoliberal-late-capitalism and the DPRK, maybe both extremes just need to die to stop this kind of stupid thought-terminating cliché for once.