>>13561844>>tall men are preferred over small men because it makes the women feel protectedThis is only one of the arguments, there are a few others. For instance people who are tall are generally well feed during childhood, which could mean they're parents were good at hunting/providing which means good genetics. It's also just associated with intelligence in general, and females are pretty good at picking up fitness queues in males.
>How would genes do XYou realize that 99% of life on earth uses genetics to pass on survival expertise right? Most species are just born and know all the shit they need to do, only a few are actually taught by their parents and that's almost exclusively limited to hunting.
Genetics can pass on a fucking lot, on top of that epigenetics can pass on even more recent things (see
http://dx.doi.org/10.1038/nn.3594).