It's no more reasonable to expect a person undergoing a schizophrenic episode to act normally, than it would be to expect a quadriplegic to tap dance. The problem has always been, what does society do with them?
We used to have them institutionalized in places that were rife with abuse. Then, using good intentions as the excuse while eyeing the potential cost savings, governments shut a lot of these places down, with the intent that community programming could replace them. Of course those systems are even more expensive to run, so government programming ended up being vastly underfunded and understaffed. The ends result is a lot of people who need treatment are falling through the cracks.