I carry concealed most of the time. I also don’t drink at all, but that’s my choice. If someone has a CCW permit, they have passed a background check and should be able to drink responsibly while carrying. If someone is carrying without a permit, odds are they might also drink irresponsibly.
My Iowa permit says 'Invalid when using or consuming alcohol or illegal drugs'. But I can carry into a bar/restaurant. I don't drink at all either, so it doesn't concern me much. 'Alcohol, tobacco, firearms' - I didn't put them together, the feds did...