Or they build trebuchets

There's a kind of qualitative difference between a game that was built to be played and later has DLC released for it and a game that is essentially built as a DLC platform. The latter has become extremely common in AAA games and it winds up feeling incomplete because the insertion points for planned DLC are usually quite noticable.

I'd say that this kind of technology lowers the cost of production enough to see those kinds of quality visuals more widely. There's a lot of rote technical effort that goes into even a single CCG card. Having a generative AI that can take care of those parts frees the artist up to focus on the parts of the art that really stand out to you. That means more quality art, for cheaper, which means more games will feature it.