I think every second family will have a mentally disturbed person. I have seen those persons being taken care of at home itself with occasional visits to the doctors.
The mental hospital houses some of the most severe cases which will make even normal ones becoming one of them after a time. Just like in jails, a petty criminal becoming hardened criminal. If Kamli could care for Pushkar why cant she tried that for Mangala too?
Why mental hospitals always have patients doing things as if to provide laughs for C grade audience watching a B grade movie?