I mean I completely agree with you but you have to understand that historically that doesn't have a great record for the people removed. It hid them away from the rest of us but at least past implementations were notoriously cruel and abusive to the imprisoned patients.

> historically that doesn't have a great record for the people removed

Is it better than what we're doing now? Having them live on the streets neglected, unsheltered, hungry, and sick?

Seems like what we're doing today has a worse record.

We should hide them away in asylums and have modern techniques to prevent abuse

There are no modern techniques that’s why we left the old ways. The fact that you have nothing to offer but vague “use modern techniques” proves there are no modern techniques. It also shows you have a shallow understanding about health.

Do you understand how slippery of a slope “round them up and lock away mentally ill people” is? How do you determine who is dangerous and who is not? How do you determine which illnesses are for locking people up? How do you reason that with stripping away due process? Being mentally ill is not a crime.