You are not describing a
Disney Cruise Line experience though.
DCL is nothing more than an all-inclusive resort on the water. Nothing about that interests me.
I travel to experience new cultures, interact with different people in different parts of the world. See amazing pieces of history. Engage with cultures I cannot find at home.
Not interested in being stuck on a ship with thousands of like-minded Americans. Same reason Aulani does not interest me. I get it that others travel for different reasons...