I think it is a question of representation.

If they say what this is, then fine, if they don't then its a problem.

The reason being that an artist rendition is almost clearly an artist rendition, whereas ai imagery can look cannily like an actual photograph, and therefore present itself as a primary document.

The problem with misrepresenting, whether deliberately or accidentally, primary documentation is that this is supposed to be a documentary, one of the few show types where fact and accuracy (should) matter.