If the quality of doctors follows the same distribution as that one of SW engineers, taking advice of a stranger might have a similar use as looking for answers on stack overflow.
After all, they are all self-taught..
Does that have much of an impact on distribution? I don't think so. You still gonna have ones which are very good at their job, some are average and the rest is part of the long tail.
Edit: Also in context of the conversation above, what I wanted to suggest is that that information can still be very valuable to whoever reads it. Even if it comes from someone who is not a doctor.
