Well With All The Revelations In Chapter 70 - Tumblr Posts

I like the idea of Josuke becoming a doctor but I don’t think he would sit through classes to learn things that in his mind he doesn’t need to heal people (though like to be fair who would have thought that Jotaro would become a marine biologist).

What I can see (and what I think is more interesting) is Josuke:

Charging rich people huge fees to fix their broken bones

Moving to a foreign country, forging medical liscenses, and practicing medicine illegally.