Doctors under a for profit model are not remotely the only possible approach to this problem space. Some good for profit health models include gym memberships and green grocers. Eating right plays a very important role in health and welfare and you don't have to wait until you are sick to wonder if your diet could stand to be improved.
Doctors for profit might not be the only model, but I'd like to see you propose any other model that actually works.
> Eating right plays a very important role in health and welfare and you don't have to wait until you are sick to wonder if your diet could stand to be improved.
Er, you do know most people are either overweight or obese? It's once thing to know what's right to do, but people don't do it or spend money on it.
Besides doctors can't guarantee a resolution, they can only guarantee treatment. If doctors would get paid only for a cure, it would just create different problems. Some people would be refused treatment because the odds of getting paid would be too low, others would have their treatment stopped because continuing would likely be unprofitable and only large institutions would be able to afford to provide services since only they could play the numbers in order to statistically stay profitable.