There were no photography art colleges 150 years ago either. Photography was widely derided by artists. Impressionism was created as a response to the increased use of photography. They wanted to show that art was a human interpretation, not a mechanical reproduction.

https://www.artinsociety.com/pt-1-initial-impacts.html#%3A~%3Atext=Some+painters%2C+such+as+Courbet%2Ctrained+discriminating+and+expressive+eye.

Edit: Looks like AI is being added to art classes in colleges. https://hyperallergic.com/944834/school-is-back-in-session-and-so-are-ai-art-classes/

So art school is already recognizing AI art as a medium.