Every single person I know who decided they wanted to fly a plane, and who had enough money to do so, ended up being able to get a pilot license.
On the other hand, I would imagine that would NOT be the case for brain surgery.
I have no doubt that, with 3 months of training, I could fly a plane. It just isn’t all that hard. I’m sorry if this offends you for me to say this, and you of course will probably dismiss this anyway, but my guess is that the job I do requires more specialized skill than flying an airplane.
On the other hand, I get into this same argument whenever I point out to teachers that, while I respect them for their work with kids, that they could easily be replaced, because almost anybody can get a teaching degree. Teaching is a field people from MY field go into if they get tired of working so hard. And I’ve yet to see a retired teacher, or a pilot, show up to take a job in my field.
Not that my field is so special, there are hundreds of thousands of people who can, and do, do what I do.