Why the heck is medical school so competitive to get into?

So just a background, I am a nontrad student who applied this cycle. I've had 6 DO interviews, 2 MD interviews, and a few acceptances. I've been working full time at a derm clinic. And from my experience, I honestly feel that medicine is just another job. You deal with unhappy people, you deal with bull crap, you deal with insurance, prior authorizations, headaches, extremely incompetent people, etc. I also feel patients have the sense that you owe them a lot because they are paying you, or... Why the heck is medical school so competitive to get into?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums