Every time my lawyer replies to my email, it costs me $35. At least. That's just for one or two line responses. Anything that requires research or (gasp) looping in a partner gets a lot more expensive, very quickly. This doctor sounds like a good deal.
This is a pretty privileged perspective. There's also quite a difference between the ethics of healthcare and legal services. Most of the time if you need a legal answer from a lawyer who charges like that, it's because you know you'll net more money from having the answer than it will cost to get a reply. With healthcare, you're not trying to make money you're just trying to live.
You're correct that I'm in the privileged position of being able to afford my lawyer. (And my doctor and health insurance provider.) I'd just point out that not everything that involves a lawyer is about making money.
But you raise a fair point, and I apologize if my somewhat flip comment came across as insensitive.