> If we had twice the number of doctors, PRNs, PAs, and nurses, their annual income would drop dramatically.

Yes, but the parent is saying that the middlemen will still charge the patients the same and pocket the difference. The patients have already shown what they are willing to pay. There is no reason to charge them less, even if your labor costs are now lower.

Theoretically competition will eventually squeeze the middleman, but it's not exactly straightforward to build a hospital on every street corner like you can a restaurant. There is somewhat of a natural monopoly there. Maybe less so for basic clinic care, but where the infrastructure needs are complex...