> Mental illness is not a monolith and it does not present the same way for different people.

I agree. Of course it isn’t. However, saying that people affected by severe mental illness are able to think clearly and rationally is almost definitionally false.

If their ability to think clearly and rationally were not afflicted, they wouldn’t be experiencing a mental disorder.

Further, just saying that I have misunderstandings, am spreading FUD, and should stop commenting without yourself providing cogent reasons why I am mistaken helps nobody.