I have assumed that, although there are models made, it is not a simple copy - paste, independent if it is from these repositories or stolen from other games. Regarding AI, it can be a good tool for certain assets, bad only if it is used as a shortcut to create a game and not just as another design tool. The AI tool listed, although it can be create other things, can be used very well to quickly create textures, for example, saving time in the game developement. AI also can be used to create classical paintings, much used in TDM, without any copyright problems, things like this, and maybe even better adapt to the plot as the same paintings used since several Years now, apart of the one I made for the Black Mage.
It is clear that stealing designs from other creators is very ugly and certainly a bad path, which is why I have said that piracy is not necessary, with the free and open-use resources available. You surely have other sources of these, apart from the list What I put.