And I say let them. This isn't like those free-to-play mobile games (aimed at people like them who don't normally play games) that are actively harming games as a whole with their insidious IAPs around which the game is balanced so it's shitty unless you pay - IAPs that are leaking into mainstream paid games as well.
That would be my mom, she had a folder with kitty pictures, and at the end of her computer time she'd flip through the pictures to gaze on beauty. Gustov was her favorite, a chubby tom with rounded paws like Garfield's, but she had kittens in there too.
I guess this was a good respite for her since she had to live with a couple of Dogs (Yoder Spitz and me).