Eeeyore, I mentioned a varying level of vulnerability to stress, not a vulnerability toward schizophrenia as a specific disease. We all have different levels of resilience.
The effectiveness of tranquilizing agents in making people feel less - which often doesn't go very far in the long run in restoring psychotic people to a meaningful, fulfilling life - is in no way a proof that distress occurs because of chemical imbalances. No chemical imbalance causing the symptoms of supposed schizophrenia has ever been discovered. Even leading psychiatrists like Ronald Pies have admitted the chemical imbalance idea was a myth. I'm not sure why you would think otherwise.
Lloyd doesn't persuade anyone to join therapy or not. People who wanted to work with him did so.
You didn't mention what you felt was inconclusive about the studies I cited - I have to wonder if you read them...