[DanBC]

Some amount of mistrust of doctors is good.

An important question to ask a doctor is "what happens if we do nothing? What happens if we do watchful waiting?"

Doctors are human and they're subject to cognitive bias, so it's useful to check what they say against the science.

But that means using reliable, reputable, sources (eg the Cochrane Collaborations) and not some guy on the Internet making money selling goji berries as a cure for all cancer.