Why not?

The phrasing of the question implies that there are already some bald men who fight like this. Interesting.

Cause it hurts...

Concussion

when i was a kid, this was the only dinoriders they had at the store. it was shit. but i loved it nonetheless

Biomechanist here. It's because even with helmets on the brain can suffer mild trauma by knocking itself against the inside of the skull. Concussion, basically. This'll lead to the brain bleeding. Happens all the time in handegg.

Because its a solar panel for the sex drive you git

First rule of bald club...