We drink on cruises because we get to a point between tipsy and almost drunk and kind of stay there the whole vacation. I mean, its a LOT of Disney, but the kid loves it, so we do that for her. The reason we drink on a cruise and not on a land based vacation...if something were to happen, say she fell and needed stitches or other medical attention, we would not be in a safe state to drive her to the hospital, legally. That is irresponsible. BUT on a cruise, medical is right there floating along with us, so both my husband and I can drink and not worry about driving or dealing with emergencies.
And OP, get ready for this...for our most recent 14 night Panama Canal Cruise we packed approx 6 bottles of wine (for the dining room), 2 bottles of champagne, bottle of Parrot Bay, a handle of Jack, a bottle 1.75L of Goose, Kirkland Margarita, pineapple juice cans, grenadine (to make drinks for the kid) and 48 bottles of water. Our roll aboard was almost 150 pounds! We stopped and bought another bottle of Jack half way through the cruise....the ONLY issue we had from consuming all that alcohol...I GAINED 15 POUNDS!!! We had half a bottle of Jack left when we pulled in to port. So yeah, we had ourselves a reallllly good time and did not bother a single person on board. (and I forgot about the bottle
DCL gifted us too!) There is a big difference between acting like a teenager at your first frat/sorority party and getting naked-wasted and being an adult and maintaining a solid buzz. I'm starting to wonder how much experience you have being around responsible consumers of alcoholic beverages considering you formed such a strong opinion about drinking on a cruise ship 3 moths prior to your first sailing.