False.If one doesn't compete then there is no drive to improve
You don't need to want to get one over on somebody else in order to improve yourself. I'm currently self-studying to bump up my resume while waiting on the market for my profession to open up. One can say that I'm competing with all those who are also looking for a job, but that isn't what's driving me, it's a need for myself to feel validated and like I'm making progress instead of just laying around, and also getting some fundamentals I expected to learn on the job (such as working with CAD) out of the way to get a better start when the job comes.
Humans don't need to compete with each other. It's ahistorical, or at least a-anthropological since it predates recorded history. It's believed that hunter-gatherer tribes did little competition between tribes; wars could happen, but were exceptional and probably flared in times of desperate need. Most of the time, there was ample space for tribes to have their own territory, and since they were migratory to chase food sources, tribes could not accumulate more resources than they could carry; without constraints of space and limitations on what one could own, there was no need for battles between tribes. There's some archaeological evidence of wounds from tools (human caused, in other words), but rarer than you'd expect if all human existence had been one long conflict of competition. War and competition only picked up at the advent of agricultural society, because all of a sudden land suitable for agriculture was scarce and getting claimed up, and people settling down meant they could accumulate stuff for other people to want.
War and competition is not an inherent part of our nature. Consumption is; we used to hunt down animals and plants to consume to perpetuate our lives. One could say, then, that we competed with nature. But we have absolute no need to compete with each other, if we've developed a system whereby everybody has access to the resources they needed, and we quit having such a fucking hard-on for private property and wealth accumulation. Our species existed in a time where those conditions were true, and I argue that the struggle of proof for whether settling down for agriculture was "worth it" only exists in the struggle to return to those conditions, with the luxuries of our modern world to boot. Incidentally, that's the end goal of socialist philosophy.
Incidentally, I feel like my greatest sins are both Sloth and Pride, and I'm really not sure if there's a sin that is my weakest, since I don't regard myself as a very good or notable human being.