Now I understand where you’re coming from. Thank you.
As to crazy and evil, society has the same goal for both: remove them from power and / or remove them from public to an institutional setting. Whether that’s curative or punitive depends on your POV. The real point is to prevent them from harming others and, oh by the way, themselves.
Stupid is a different case, at least at first glance. We also ought here to explore the distinction between stupid and ignorant.
Ignorance in isolation can be corrected by more knowledge if the ignorant person is inclined to accept more knowledge as an inherently good thing. Which some few are but many more are not so inclined; not even a little bit. “Proudly ignorant” is a buzzphrase for a reason. It resonates with a common aspect of human nature.
Stupid is even worse than ignorant. It’s very impervious to improvement even if the owner of a stupid brain recognizes their plight and wishes they were instead a rocket surgeon.
My bottom line:
If I was placed in charge of e.g. MTG’s rehabilitation / neutralization I don’t know that I’d do anything different operationally if I magically knew her exact admixture of Evil, Crazy, Stupid, and Ignorant.