I went in to my GP a few years ago when I first started doing some different nutrition stuff:
Me: Is too much protein bad for me? My kidneys? My liver? Anything else?
My GP: Well, you have to have a lot before you have to worry about that.
Me: How much is too much per day? 100g? 200g?
GP: I wouldn't do anything over 150g/day or so.
Me: my trainer has me at 310g/day. Is that bad?
GP: No, you're probably ok as long as you don't go over that.
Me: ????
The last few years have made me realize that my GP may not know much more than what the drug reps tell him. He spends around 4-6min per visit with me, speaks extremely fast, and books it before I can speed talk my way through more than 3 or 4 questions.
I don't feel like GPs should be the last line of defense between me, a medical layman, and whatever drug that Pfizer wants to kick out with a cool cartoon commercial and a colorful pamphlet. If you do, you are not thinking at all.
The above is an anecdote, but I feel like a very similar process could be explained to anyone else who is horny for many of the common Libertarian policies.