Perttu Häkkinen: "Is there anything at all that all of your fans have in common?"
Markkula (immediately, without hesitation): "Mental health problems."
Seriously though, as we age, we all develop issues here and there. It's part and parcel of being human. Everything affects everything else, so untreated problems eventually lead to other problems.
There's nothing wrong with needing help or asking for it, but like many others have already said, there's something repellent about people making their (self-)diagnoses their entire personal identity. Can we coin the term "toxic infantilism" to describe that type of behaviour?
As mentioned before here, I indeed have a condition that restricts my mobility and physical abilities pretty severely. While it's no fun, I work with what I have, because what else can you do. Everything has their issues, and this is mine. I also try to remember that it could have been much worse, it was literally a matter of millimetres that areas dealing with things like memory and cognitive function might have been damaged.
Only tangentially relevant to this thread, but I've found that reading memoirs of retired doctors, surgeons, psychiatrists etc. helps to put things in perspective. I'm not talking about just my own issue, but this whole "human condition" palaver. If you're interested, check out such writers as Henry Marsh, Stephen Westaby, Seamus O'Mahony and Theodore Dalrymple.
(Dalrymple writes about many other topics too, but none of it is particularly interesting in comparison to his actual ara of expertise, which is psychiatry)