Unfortunately that is what they were taught back when he was a young man. No one understood about biochemical imbalances, and, even if they did, they had no idea how to fix them. There were some attempts but usually the drugs had side-effects that were worse than the disease.
But, we have more information so we know it is not something you can SNAP out of. So perhaps that is part of it.
I am sure he loves you as best he can.

And he wants nothing but the best for you. Unfortunately Dad's of that generation are not real good at saying so.
We love you too and are glad to hear you are making some progress!!
How is today going?
Jan