ALL THE TIME!
I had a horrible rash which the dermatologist couldn't diagnose. I almost didn't want to go back to school because this rash was so painful. I was already missing a ton of work. He just gave me some steroids (after my GP gave me a ton of antibiotics) and told me it was definitely NOT related to food, and that it "could or could not" happen again. Gee... I coulda said that myself
🙄 about the 50%-50% chance of it happening again. I later found out (self-diagnosed) that it was because I have a new intolerance to wheat and milk! The doctors were of no help in my case, and I went to quite a few.
😡 I find that most of the time, at least in my case, all they care about is masking the symptoms instead of actually finding out what is causing them so that you are "cured." I guess if you're cured, you won't keep coming back to them and they won't keep making money off of you.

That's my rant for the day.