GT has a great point...and you can see that by the question you asked yourself...are you leaving the door cracked?
Look at it this way...with everything you have going on, so freakin' much on your plate, this drinking thing is taking up space on the plate, lots more than you realize. When you take it off the plate completely and for good, other stuff can spread out and doesn't seem quite as overwhelming.
In other words, leaving the door open for future drinking is making everything harder.
The big plan actually lightens your load. That's one less huge thing you don't have to give any precious mental energy to...buh bye...not an option...