This is a bottom barrel dev practice that is exacerbated by AI, not something that AI is causing. People noticed this trend over a decade ago and it's been getting worse even before AI-image generation:

https://www.gamedeveloper.com/business/why-do-strategy-game-... (2015)

https://www.ranker.com/list/clash-of-clans-screaming-dudes-k... (2020)

It's a bottom barrel dev practice that has been massively enabled by AI.

We haven't seen any such enablement for quality games.