What sort of qualifications? 99th percentile talent in subjects like organic chemistry, which are actually not used by 99% of doctors in the real world? Willingness to work themselves so long and hard that their judgement is usually substantially impaired?

And does the (my impression) widespread support for oh-so-rigorous qualifications for doctors reflect any real-world data about actual resulting quality of patient care? Or is it a way for prospective patients to vocalize a bunch of anxieties and emotions about medical care, plus a way for the doctors who've had to endure such treatment to say "all the noobs should have to suffer as much as I did"?