There's 48 hours to make the game, you can't find consistent license-free art in that amount of time. Generative art for concept games is the most ideal time to use it. Especially since this team (had you spoken with them) was primarily programmers. If the game gains traction, real art to support artists would be used. Your ideas gatekeep game development, glepnirk.
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game jams and development have existed long before gen-ai was a thing, and yet they still could make concept games. all gen-ai does is make your game look worse and seem like it hasn’t had effort put into it. it isn’t gatekeeping game development, it’s making sure the environment and artist’s jobs still exist 20 years from now. find some artists to put on your team, it isn’t that hard! Your ideas hurt artists and the world, Saskinot.