I'm not exactly a highly qualified expert on evolution, but I hear this step in lines of thinking a lot and it strikes me as being a logical fallacy. As a more extreme example, I often hear "these climate changes activists make no sense because they're also the ones pushing evolution: why would a species evolve and then destroy the planet it evolved on"? It's also circular logic. Sometimes evolution results in weaker things dying off. But that doesn't mean that weaker things dying off is inherently a good thing and that because we have evolved we probably do it at the optimal rate.
What you're seeing as the result of evolution is everything that survived SO FAR. It wasn't intentionally planned to keep surviving. It's just that those two things tend to go together. We could annihilate every living thing on the planet with an all-out nuclear war later this afternoon, and it wouldn't be inconsistent with the theory of evolution.