Does Mental Illness Really Exist?

I was on my way to my meeting with my psychiatrist for an assessment about previous issues, when I was stopped by a woman who told me “I DID NOT have a mental illness and I should stop going to the doctor and stop taking my medication”..... what BS advice
I thought that was funny until she said she was serious, after that I told her to **** off and went to my meeting.

I looked it up and found out she is not the only one that believes this…
then a friend sent me this “warning” extreme bible thumping

So are these people that believe it doesn’t exist really high or retarded? I would love for them to walk one day in my shoes
What else could it be?