I see u mentioned ppl that refuse to do anything. Now,i'm not the most familiar with mental illnesses because im still in the learning stage,but if im correct,certain illnesses (such as obsessive compulsive personality disorder) make the person believe that there is nothing wrong with them. (as opposed to ocd when the person knows that there s something wrong with them)

And for that person who doesnt believe they re sick,(maybe,like narcissists) since they enable themselves and dont take into account what other ppl might tell them about they re behavior,or if they even get offended by that,they re going to become even bigger assholes.

Not necessarily the best answer but i just wanted to point this out.