Don't want people stumbling into church drunk!
(That being said, even though I think it's a silly rule, it just seems to exist to annoy alcoholics who can't plan ahead. I'm not an alcoholic, and I rarely consume alcohol before noon, so I just laugh at people who whine about this law.)
Was at the airport on a trip with friends with the flight leaving before noon. None of the bars could sell. We are not alcoholics, but we were on vacation. Well, we were trying to start the vacation but had to wait until leaving uptight red state