For every dropout success story, there are probably thousands of dropout failures. You just don't hear about them. Sure it sounds great, drop out and try new things and follow your passions. But when you're $200k+ in debt, it's probably not the smartest idea.
Yes, I understand this bias. However, of the two friends who have dropped out of medical school. One who has been out a little over a year and his company has just received over $7 million on venture capital. Another left after first year to do some some consulting type stuff, and two years later is apparently doing quite well financially. They each had a plan, but took a bit of a risk.
Of course not everyone has those options, but not everyone looks for them either.
Five years of residency salary vs a good industry job, the latter can pay off the loans faster. Industry here could be business, technology, etc. If you work for a finance type company, depending on how well the company does that year, you may be able to take a big bite of your loans with your yearly bonus.
I'm not saying that all exit strategies are the same, but technology and business for example can address financial problems. Other choices might address other personal needs for fulfillment, time off, outdoors time, or whatever floats your boat.
Likely someone who was able to focus a lot of energy and overcome obstacles and make if into medical school, can likely do that again in other areas.
Some things are also a lot easier in other fields. Only medicine and the government are so obsessed with particular educational milestones and credentials. In business in technology, it's typically (when things are going well) much more about what you can do and how hard you hustle (and admittedly who you know and how well you schmooze). That means you don't have to wait around earning your stripes as much. You can advance more rapidly.
Anyway, I'm not saying that everyone who drops out of residency or medical school is going to be rich and famous. However, I'm guessing there are not many dropout doctors standing in the soup line. I bet, like the handful I know, they go do something interesting and useful and do a good job. We're not talking about dropping out of high school here, at crux it was originally about not doing residency. Just talking about research alone, I know many top researchers who never did residency. I'm glad they do their thing, and they seem very happy.
I am not trying to give advice, just raise the point that I know several people who started medical school, either haven't finished, didn't do residency, or did residency and then rapidly did not practice, and none of them are unhappy or poor.