You might be a functioning alcoholic, but when alcohol intoxication is so prevalent in your life it interferes with day to day routines activities, it absolutely meets the psychosocial definition of addiction, and likely points to a deeper one.
Every rural area I've ever worked in had a non trivial number of folks who would have 2-3 drinks at the bar/whatever on a Friday or a Saturday and drive home. It was not alcoholism, it was "I'm totally fine to drive, the law doesn't know my limits" etc.
On some level that's just the price of wanting to go out and not wanting to drop a bunch of cash on a taxi (assuming you can get one to come).
2-3 drinks on a Friday night when you're supposed to drive home is different. I'd also say "I can drink because the law is wrong" is also not exactly a neutral take.
- I believe the law is overly proscriptive / strict / wrong.
- I believe I won't get caught
It's no different to someone speeding because "It's clear conditions and I consider myself to be perfectly safe at this speed". Or skipping a stop sign "I can clearly see nothing is coming".
Generally driving drunk is a sign of addiction.... And that can come back anytime, and killing bystanders is clearly a worse outcome.