As others already pointed out: the additional context information. So while I probably got the initial idea of the photo, adding the information that this crown was from the louvre heist, added a new layer of information. Now I could also laugh about the probably unintended joke that he tried to steal his royality back. It just makes the photo so much more interesting.

As a non blind person I really appreciate these alt texts/image descriptions.

Yes. Same as: 225×2 is not 550. Well, duh, obviously

This is just stolen from a Terry Prachett Novel.