I don’t need to read your argument because I came to the exact same conclusion.

There is no argument to be had, then. You asked a question, I provided clarification

I just don’t think madness or insanity are useful terms for understanding psychology, nor is making a distinction between the two really worth the effort.

I vehemently disagree. If the distinction is not established then neurodivergents will keep on being misdiagnosed and fed drugs that may or may not work for them.