You're conversing with two or more seperate and distinct individuals. Velvet never blamed Dr. Vause for Brian's death. In leteral, strictly technical terms, Dr. Vause didn't kill Brian. Brian did. That's why the term is suicide, not homicide.
However, if "Dr." Vause is going to hold himself up as a treatment expert and professional, then he ought to be held to the same standards as any real medical professional, don'chya think?
Remember thalidomide? Once upon a time, doctors used to prescribe it to pregnant women to combat symptoms associated with morning sickness. It seemed to work with few serious side effects. So this was considered good medical practice. Soon, it was discovered that thalidomide caused horrible birth defects. Good doctors the world over quit prescribing it or patted themselves on the back for waiting for the other shoe to drop and having not tried it on their patients to begin with.
In other words, real medical professionals take a serious and dedicated interest in the actual effects of their treatments on their patients. When a treatment is deemed to be more harmful than helpful, real doctors quit doing it and are generally favorable to putting the word out to other professionals and laymen so that they don't make the same mistakes.
This is not the case with "Dr." Vause. When a client does not respond well to "treatment", "Dr." Vause essentially tells them to go drop dead. Is anyone surprise that sometimes they do? Not only is there no serious effort to keep in touch with former clients or to make anything like a long-term outcome study of former clients, but former clients "in good standing" are forbiden to even communicate with former clients "not in good standing" (unless, of course, like you, they're rabidly defending the quack guru)
I would leave you with this aphorism:
"There lives more faith, in honest doubt, Believe me, than in half the creeds."
--Alfred Lord Tennyson
If you have so much faith in your guru, why not look up as many former clients as you can find, talk to them, find out how they're doing in life so that you can assure yourself that the program really does "work".
Don't worry about temptation--as you grow older, it starts avoiding you.
-- Old Farmer's Almanac