A post of mine got somebody thinking? Cool.
Yes, I think noncompliance is a big reason for people not getting well.
It's something I'm reminded of every day in my job. People deny or minimize their symptoms, go off, or don't go on prescribed meds at all, and decompensate, sometimes rapidly and to the point of being homeless, suicidal, risking their physical health, etc. because their symptoms make them completely unable to function.
I realize that's not your situation, DSF. You probably function at a pretty high level without meds or therapy, but once you accept therapy or meds or what have you, this whole other level of functioning opens up and you wonder whatever held you back from doing it in the first place.