Isn’t it obvious? Integrity is about honesty. They showed a picture claiming the school is one way, but the picture was a fabrication. It’d be the same if they were staging food in the cafeteria for marketing, but that food isn’t available to students.
You can make what you have look as good as it can, and I’m sure everyone does that.
But AI fabrications are crossing the line to outright lies, which is by definition violating integrity.