Remember, the point of evolution is not to survive for as long as possible, it is to f**k as much as possible (for a male).

No, and it's not even to have as many offspring as possible. It's to have as many copies of his genes in future members of the species.

Consider to male proto-humans, Adam and Bob. Adam has sex with his sister, they have 6 children, but all die without reproducing.

Bob never has sex, but is a good uncle to his brothers' and sisters' kids, 4 more of which survive to reproduce than would have done without his interventions.

Which one was more effective at passing on his genes?