It cannot...
...nor can anything else. It's just another in a long list of inappropriate behavior they get to explain away with "I was drunk," because people like us continue to accept it.
I've said before and I'll say again, I drink sometimes and I've been drunk a few times over the years. I've had opportunities to cheat on my alcoholic wife and I've never done it. Not only that, but being under the influence is not an excuse for ANYTHING I have ever done, and I've done plenty of stupid things; far more than my share (and I did most of them sober).
It's a bullshi* excuse. They all are. They are separate issues-- completely separate issues.
Be strong, go to Al-Anon a lot, and never forget you aren't on this earth to be miserable, forfiet your life to an alcoholic, or save grown-a$$ men from their alcoholism.
Take care,
Cyranoak