there was an escalator, I really don't see how anyone could manage, unless all they had was carry-on luggage.
Those of us who fly way too often become quite adept at navigating escalators with a pair of "roller back" suitecases. Nonetheless, every airport and every cruise terminal now has a wheelchair route with elevators instead.
Considering how slow the elevators were, and how quickly one could claim their baggage, I don't see the benefit.
It's much more convenient to wheel my own luggage off of the ship because it eliminates the time spent fishing around in the designated section of the terminal for one's luggage. Also, the longshoremen who unload the luggage do not always set pallates of luggage down gently, and thus may break both the bags and their contents. I have had them cause more damage than the airlines!