you put your conclusion first, and I must say I disagreed with it when I read your first couples of lines. Because medicine is
actually hard - it's not that students have to "go through hell because that's what they had to go through."
Medicine is really hard. I have a condition that affects my lifestyle, I have to learn about it, the more I learn the better my outcome. I'm not studying medicine and only "have to" learn one little part. All the same it is not easy. It would be as though all someone had to do in their entire life was (something specific) but computer science is so hard that this is not easy.
I would say medicine is harder than computer science. DNA is 650 megabytes, not every underlying process is understood, drugs and their interractions have to be learned with tons of difficulty, even after you specialize you have to understand the entire system.
But then I read the rest of your comment, and I must say - perhaps it is true that there is room for someone to "diagnose pneumonia" or something. Doctors are expert systems: but perhaps there is room for lesser expertise.
(A small aside - it is certainly true that the long required training artificially reduces supply of doctors in the united states - however I think you are using an imprecise term "rent-seeking" and should pick a more specific term from economics since I think you are technically misusing it.)