It keeps people that only came to the Louvre to see it (and nothing else) well-contained to one area.
Leaves more room for me to look at the actually interesting stuff!
Like "Psyche Revived By Cupid's Kiss" (https://en.wikipedia.org/wiki/Psyche_Revived_by_Cupid%27s_Ki...)!
And there's the matter that I am of the firm opinion that art being damaged doesn't stop it from being art. It just adds to the story behind the piece.
Also, I fucking love cats.
It seems entirely reasonable to me that some people would value an important cultural artifact over a kitten. However, I wouldn't expect ordinary people to choose the Mona Lisa over a human child.
No it's a pandering to the audience question. Ofc everyone would say the kitten to feel better and to show off (especially when the whole GP is about that)
Mona Lisa is irreplaceable. The world won't miss one more cat. Losing an irreplaceable piece of history makes the whole of humanity poorer.
Cats have the evolutionary benefit of being cute to humans. Would you even consider saving say a rat or an eel in such a situation?