It's understandable, as talk therapy is basically useless against untreated Schizophrenia. Unlike other mental illnesses, a tether to reality has to be created first - and that can only be done chemically/biologically through medication.
Psychotherapy requires a relationship; relationships are built on trust. The psychologist simply cannot complete against the will of the patient's reality (their untreated persona/thoughts). Not even their loved ones can, and doctors are complete strangers (and when it comes to those whose symptoms include paranoia, doctors are in fact the enemy). It's a fool's errand until an effective medication regimen is underway.
