I like what someone pointed out about your value system. It's not up to whether it'd be a problem for someone else.. this is you and what YOU want out of a partner.
To some, a few beers a night is not a problem. To me, even one beer, every single night, is a problem.
I don't want to marry a man who has to drink that much. It's against my beliefs, after being raised by alcoholics. As it's said, it is progressive.
My exbf could meet a woman, and she could laugh that I consider him to have a drinking problem. Maybe he does, maybe he doesn't. However, he drinks too much in regards to what I want and expect from a partner for life.