I would think it's both reasons - can't monitor and cash cow. However to negate the first one, why do they give you a mini-fridge that has booze in it? They can't watch you drink that. Sorry - that one doesn't hold a lot of water - er booze.
The bottom line is the money. They very seldom cut anyone off for being too drunk. How many times have you seen or read about drunks.
Money, money, money, money.
Dec. 13 - Windstar sailing yacht. Wonderful!!
Just completed - Celebrity Reflection, Nov. 22 (learning to sail solo) followed by Independence of the Seas Nov. 30.
44 cruises - too many to list however cruiselines are in no particular order:
and some unknown tub
Yes, I'm a Royal Chump and proud of it.