I don't mean to get into an argument about this, but as someone who also doesn't have great hair genetics and has looked some into it, "solving" hairloss isn't

I don't mean to get into an argument about this, but as someone who also doesn't have great hair genetics and has looked some into it, "solving" hairloss isn't turnkey and doesn't produce the same results for everyone. There's genetics at play and things we don't know (if any startup/company does solve it, there's a pile of gold waiting for them). If you want a counter example to your Elon, take a look at Lebron James. Anyways it's entirely possible Mark has looked into it and doing it what he can (and we're seeing the results of it), or simply he doesn't care as much and is okay with what he has, or I'm off base and he picked this haircut despite having an abundance of hair available to him.