Oh dude, the doctors are the worst. THERE IS NO MONEY IN A CURE. I REPEAT. THERE IS NO. MONEY. IN. A. CURE.
That all depends on the system. In the US system, I can imagine that is so. In our public health care system, the doctors don’t really have an economic incentive to keep you addicted or sick(*); they actually want to help you with your problem. However, if you go to private health providers, you might experience otherwise. And especially if you go to quacks.
(*) There have been a few known examples of doctors doing unecessary treatments over a prolonged time, but those are the exceptions. There are control mechanisms in place to catch such cases, but cheaters will cheat.
It also depends on the individual. The US system as a whole bends toward sickness in important ways, but individual doctors do possess ethics and they are not all bad apples. They have to transcend a bad system. The other problem is that we’re no longer in the situation where the local physician and the parson are the two most revered figures in the town (and often the most educated); doctors are usually not self employed now but typically start their careers working for a corporate system of some kind, and deeply in debt for their medical education. So many of them are just putting one foot in front of the other, bound by their employer to crank patients through in 15 minute intervals, and usually not taught to listen, nor bestowed with real diagnostic skills, for that matter. For this reason I have found it necessary to self-advocate, self-educate, and I want a doctor I can steer a bit.