Depending on when you go, there is something to be said for the number of people they allow in at one time because you can’t as easily appreciate the floor as you can the ceiling.
It's actually not all that unfair due to their notoriously poor eyesight. You could tell them that anywhere was the Sistine Chapel and they'd believe you. If they spoke English, that is
Bats are not blind and can in fact see quite well using their eyes. While most bats do have advanced ears that give them a form of vision in the dark known as echolocation, these good ears does not require them to have bad eyes. Bats use their good hearing to find food in the dark of night, and their good eyes to find food during the light of day. The vision of bats is tuned to low-light conditions such as is present during dawn and dusk. While some bats may not have as good color vision as humans, their overall vision may be better than humans during dawn and dusk.