It's just a bunch of quacking IMO, do you think you have the power to "make" him drink or go crazy? Really? Going NC is not going to kill him, trust me. You are not responsible for him or his sobriety.
My exah moved out 18 months ago and our divorce has been final 10 months now and he STILL does not "get it". It has taken this long just to get to the point where he does not constantly call and pester me (I can't go totally NC because we have a 15 year old son). I refuse to communicate with him except regarding our son because even minor small talk gives him the idea that he still has a chance. I keep my dating social life under wraps because exah STILL interrogates our son about my every move so I do not want to put him in that position.
I too wish he would find someone else but he still idealizes our marriage (and why not? he lived like a king and I was his indentured servant basically).