Ohh another believer.
Copy Cat is right, SSRIs tend to have an upper effect while olanzapine is a downer.
Hence the gas and brake analogy.
I agree his doctor is a nincompoop
Again, no, these aren't uppers and downers and this isn't a gas-brake thing. These medications affect different symptoms.
Many people with schizophrenia find this combination very useful. Others prefer other combination. Study pharmacology, I think it will help you understand these medications. Not a good idea to say someone's doc is a nincompoop without having the knowledge of what the medications do or what has worked for many people. And dangerous and irresponsible toward the individual, and disrespectful of their rights, to try to talk them into going off their medication.