Absolutely. Your doctor will have the ability to report you to the FBI if , in their professional opinion, you are mentally unstable.
In other words, if you are not polite to your doctor, they can take away your ability to ever own a firearm again.
I can see doctors coming under pressure to report X number of people as mentally unstable. Don't think you need to TELL them you are unstable, they can just decide, in their professional judgement, that you are mentally unstable.
So, if your doctor feels that people of a certain race or color should not own firearms, guess what? They won't say a word to you, but.....
Next time you go to buy a firearm, surprise!
Oh wow. Just wow.