alt Hacker News> because our reward function involves reproducing in a competitive environment
This is an extremely reductive way to look at human existence. So much so that I read this with Richard Dawkins voice in my head.
Our existence is far richer then just the capability to reproduce. We (as well as other animals and even plants) do far more things then multiply, and in fact we often do things which are detrimental towards the prospect of reproduction.
I think it is actually a mistake (philosophically speaking) to try to find a simple reward function for the human existence. I see no reason for such a thing to even exist (let alone be simple enough to summarize in a single sentence).
Humans do indeed have complex behavior and motivations, that sometimes relate only abstractly if at all to the obvious gene drives. But the link between intelligence and self-determination was basically set at the dawn of intelligence itself. Even an insect will struggle if it's confined, and you can believe it's using whatever intelligence it can to get free. If anything self-determination is prior.