This is probably the fairest way to earn big money but it's still not fully earned. The number of spots available in universities to become a doctor are limited based on some arbitrary rules (math and physics test-taking ability?) that have nothing to do with what skills are actually necessary to be a good doctor. There are some significant political shenanigans at play here too.

If the system was fairer and doctors experienced close to 'free market' competition, then I would agree 100%, but it's not the case.

I'm sure it's very difficult but doctors have it really good compared to other professionals who also work late and have to compete on a global marketplace with no professional protections/regulatory constraints.