And I don't disagree with that statement.
However, sofar almost every last one about sailing another line has been with the statement, 'It's not about ship, it's about the destination.' That kind of drops the opinion of the ship part. Might as well just do a land trip if you think what ship you're on is so irrelevant.
I don't think the ship is irrelevant, but I do think it is secondary to the itinerary. Besides - you can't do a "land trip" to visit Southeast Alaska. Skagway is the only port town visited on most cruises that is accessible by road from other parts of Alaska or Canada. To get to the other ports requires a boat or a plane.