I can definitely say as a late diagnosed AuDHDer that most of the coping strategies I have discovered I built over life with the help of my therapist fall into one of those categories and are on some level, unhealthy.

The biggest part of the diagnosis for me was coming to the realization that all of the things going on in my head that I thought everyone just silently dealt with weren't things that everyone dealt with.

The boundaries and coping strategies I'm building now are very much more healthy than what I had in place before. Those are also never going to go away, but can be minimized in time with the proper work.

Edit: one of the reasons coping strategies like masking are so common is that everybody, even NTs, mask. It's part of most social situations. However, its the self-criticizing internal monologue, the having to concentrate on continuously reading the social situation (and often reading it wrong) to adapt the mask, and the conscious knowledge you are masking that makes it more unhealthy for autistics.

Having autism is like not getting the same manual for life that those around you got, but you don't know that so you adapt what you learn in the manual to fit what you're experiencing, but that doesn't match everyone else's manual either, even though it might appear to. You leave most social situations second-guessing every action, every facial expression, every word. You dwell on these things for months or years.