You are absolutely correct! No one said not to detach. Not to protect oneself. Absolutely! That is not the issue. PEI is detaching and is doing a great job. This is a debate about marriage, vows, committment.
Just about every spouse on all of these forums "needs help". Does that mean all the LBS's should walk away?
I don't think so.
My point about mental illness is that you can't blame the person who has a mental illness for their actions. They need help without any question. I totally understand that by walking away you feel that you are helping them. Just don't blame them!