It is not proven myth.
No, body mechanics are the same. In context of martial arts avarage woman is a smaller man.
It's ******** because physics works the same for any martial art. And there is no science in WC, there was no scientific research and experiments with WC, but olympics full contact sports and sportsmans were many times measured by real scientists (especially suring Cold War when both sides goverments wanted to have better sportsmen for propaganda goals).
What do you mean by "more technical"? For example BJJ has about 1000 collected techniques, boxing has a few but polished like a masterpiece.
Or maybe WC was created to be used in very specific enviroment but morons like Ip Man, Boztepe, Cheung, Wong etc wanted/wants to prove that it is the best fighting style for all circumstances
No. Human body is no created to fight and hunt. We have no claws, no talons, no fangs, no crusts, no thick skin. We are created to walk and use a tools.