A regular GP is probably less adamant about the need for psychotherapy as an adjunct to psychiatric care. Personally, I think it a good thing that pdocs realize medications alone generally aren't sufficient for treatment of serious mental illness and ask their patients to also be in therapy. Most people do need more than a single-pronged treatment for mental illness.

My pdoc has always asked that I stay in therapy or at least stay in contact with my therapist so if needed, I can access his help. And the hospital I have been in requires patients have both pdoc and therapy appointments set up before they can be discharged.