Well, you might look for data on how many patients discontinue any sort of treatment for starters. "Patient compliance" would be a starter for such a search.
I get the impression that you have an "attachment" style relationship with your doctors, I don't mean that as an insult, I think that leads you to think that other people are interacting with them like you are, and would not possibly discontinue their long term interactions with the doctor even after deciding to go off drugs. Obviously not everyone is like you.
I'm not the one making the claim; it's not on me to provide evidence.
Conceding your analysis of my particular situation, "not everyone is like me" is a far cry from "nobody is like me." If this condition has high incidence, and even a fraction of people were like me, it would be much more common knowledge than it seems to be given the quality and volume of evidence available.
I get the impression that you have an "attachment" style relationship with your doctors, I don't mean that as an insult, I think that leads you to think that other people are interacting with them like you are, and would not possibly discontinue their long term interactions with the doctor even after deciding to go off drugs. Obviously not everyone is like you.