Genetic survival of the fittest is not just about the reproductive success of the individual. It's also about the reproductive success of people genetically close to the individual.
Evolution does over time enforce behaviour that is better in terms of survival of reproduction.
That does not however mean that evolution will push humans to behave optimally in terms of reproductive success. Genetic evolution is a very crude process. Having genes enabling cultural evolution (which can take place much quicker) might be a better way to maximize reproductive success than direct genetic control over behaviour.
Evolution does over time enforce behaviour that is better in terms of survival of reproduction.
That does not however mean that evolution will push humans to behave optimally in terms of reproductive success. Genetic evolution is a very crude process. Having genes enabling cultural evolution (which can take place much quicker) might be a better way to maximize reproductive success than direct genetic control over behaviour.