> Also, if you are a doctor and your primary motivation is helping people, wouldn't you want to help many people with simple problems, than few people with highly complex problems (which most likely have a higher risk of failure)?

Your analysis completely falls flat here. Not all doctors are motivated by the same things and yet most of them would consider their primary motivation helping people.

Neurosurgeons are a prime example. They would very much prefer few complex cases (not everyone gets a brain tumor thankfully) as their way to maximize benefit rather than manage cholesterol meds for 100s.

Speciality surgeons by their nature are motivated by a certain degree of risk.

The incentive for doing difficult procedures is often because they are challenging. Compensation for doctors in the US isn’t fully correlated with difficulty either... with no offense to my dermatology colleagues making more than most general surgery sub specialists.