I don't think alcoholics should CTB until they've tried long-term sobriety.
I hear what you're saying, but I was sober (obviously) before I became an alcoholic, and shit didn't work then, hence the alcoholism. I can't prove it, but I'm fairly sure I've made it this far, at least in part, because of alcohol. I have no reason to think that sobering up would solve my particular suite of problems (BPD, some autistic traits, other issues).
I just think that, having tried long-term sobriety before alcoholism, I don't need to try it again. I just don't work properly, and my life now is a pile up of consequences of that.
Maybe I'm too negative, but that's how I see it in my particular case.