There are a lot of professional photo opportunities on the ship for the passengers. They can get their picture taken on the main staircase in the atrium, or... a few yards over, they can get their picture taken in front of this staircase backdrop. Sure, the staircase in the backdrop is a little fancier than the real staircase, but it's not, you know, an actual real part of the vacation they're taking.

It seems to be a popular option.