so you’re telling me there’s an alien who regenerates into a completely random form, that he cannot control or determine himself, and who understandably could take millions of different appearances, but who all 13 times just turned into a different skinny white guy
Well that’s probably beause the Doctor isn’t human and the Gallifreyan race only consists of skinny white people. The Doctor is not a human. He does not regenerate into a different human every time. He regenerates into a time lord and time lords are different to humans. On Gallifrey there is probably no such thing as different skin colors. Or have you ever seen a Gallifreyan/time lord that isn’t white?