Telling people not to seek medical attention because you know someone who refused to go, it didn't work —
It's completely irresponsible and reckless! Those are anecdotal stories.
Of course someone should attempt to do what they can to help if in their own circumstance they feel it warrants it. If it didn't work out for you, that's unfortunate, but that doesn't mean it won't work out for someone else.
(I myself was unable to persuade my ex to see a doctor or convince others to help, but I can see now this was in part because I just didn't have the language to describe what I was seeing.)
If we are on a forum for heart pain, would you write, don't seek medical attention because my aunt's friend had chest pain but it turned out to be indigestion? Of course not. Would you say, don't bother checking on Ebstein anomaly, it's rare, if someone thinks they might have finally figured out what is going on?
The brain is a physical organ.
This forum is about as relevant as a discussion of "humours" if people cannot discuss this in medical terms.
Our exes aren't all a bunch of jerks. Some are very unwell and at least deserve our compassionate attempts to understand, and if possible, help.