Another problem for a he-Santa would be getting there. First of all, there would be no reindeer because they would all be dead, gutted and strapped on to the rear bumper of the sleigh amid wide-eyed, desperate claims that buck season had been extended. Blitzen's rack would already be on the way to the taxidermist. Even if the male Santa DID have reindeer, he'd still have transportation problems because he would inevitably get lost up there in the snow and clouds and then refuse to stop and ask for directions. Ho Ho thing would seriously inhibit their ability to pick up women.
Cupid flies around carrying weapons.
Uncle Sam is a politician who likes to point fingers. Any one of these guys could pass the testosterone screening test. But not St. Nick.