We acknowledge sexual dimorphism in every other species, including mammals, and the extremes of sexual selection of traits. but turn our brains off when it come

We acknowledge sexual dimorphism in every other species, including mammals, and the extremes of sexual selection of traits. but turn our brains off when it comes to humans as if there is zero influence of the same selective pressures just on the off chance that someone would try to marginalize another human based on this information how do we get beyond this?