The current system does allow for experimentation, but provides a conservative framework for it.
It's huge personal hubris to announce that you know better and they haven't thought it through. Which is one of the things the approach is aimed to protect us from.
Which most people seem to think is wrong. The vast majority of treatments that get prescribed by doctors are unproven in terms of safety and efficacy. The main differences between the status quo and a proper experiment is that we're not recording any data or allowing for informed consent.
https://en.wikipedia.org/wiki/Timeline_of_peptic_ulcer_disea...
June 12: Marshall intentionally consumes H. pylori and becomes ill. He takes antibiotics and is relieved of his symptoms.
That's personal hubris! :)