You clearly have sufficient wealth and/or insurance to make such a decision. Most people don't, and either get a short list of approved doctors and procedures, or wait until it gets bad enough to go to the emergency room. These people are not choosing anything.
Of course you can shop around for a doctor who will diagnose and prescribe what you want. All you have to do is find someone who will completely disregard medical ethics in the name of being paid to give you expensive happy pills.
And there are plenty of doctors that will do this.
I'm not making a value judgement, I'm just making an observation. The way I see it, the less drugs needed to keep me operational, the better. So I choose that kind of doctor. But other people like their drugs, and choose doctors that prescribe drugs.