What does hair (or lack thereof) have to do with anything?
For some reason, that's actually a pretty funny troll. He should've added on to it though. "If he's so smart, he would've found the cure for baldness already".
Grass doesn't grow on a busy street...
Parts of him are actually quite hairy. But fortunately, just like his theory of everything, he's doesn't bother telling people, since doctors wouldn't understand it. [1]