To be fair a non negligible amount of people with schizophrenia end up involuntarily committed to a psych ward at one point or another. I don't think it's right but once that happens you are no longer free to refuse medical treatment from the doctors in the hospital.

If people are regularly receiving antipsychotic injections and electroconvulsive therapy against their will I don't see why a cell therapy or outpatient surgery would be off the table.