>If you asked a anthropologist, I suspect you would hear a pattern of human beings doing all kind of work in order to increase their status in society and finding a mate.

Being a garbageman wouldn't help with this nearly as much as spending 4 hours in the gym and then spending 4 hours building socializing skills. Especially since the other side is now guaranteed being provided for thus reducing the already low impact that being a good provider has on mate finding.