The tail isn't harmful to the peacock that grows it. It's helpful, attracting sexual interest. This is the paradigm example of sexual selection. You're trying

The tail isn't harmful to the peacock that grows it. It's helpful, attracting sexual interest. This is the paradigm example of sexual selection. You're trying to defend the idea of evolving baldness so as to repel women, which is the opposite of the example you cite in "defense".