To me, art is a form of expression from one human being to another. An indie game with interesting gameplay but AI generated assets still has value as a form of expression from the programmer. Maybe if it's successful, the programmer can afford to pay an artist to help create their next game. If we want to encourage human made art, I think we should focus on rewarding the big game studios who do this and not being so strict on the 2 or 3 person teams who might not exist without the help of AI.
(I say this knowing Clair Obscur was made by a large well respected team so if they used AI assets I think it's fair their award was stripped. I just wish The Game Awards would also consider using such a standard.)