I mean, I do see where you're coming from, and I have in the past second guessed some medical advice and asked if they'd considered a particular diagnosis I had a hunch on.

On the other hand, they're a professional and they've usually spent the majority of their life training to be good at what they're advising you about. I don't demand to be involved in the design of planes I fly on or bridges I cross, because frankly I'd do a worse job than even a pretty bad qualified engineer.