It's not an immutable fact of the human society.
Unless the problem is people isolation in way, that people would not consume standardized content that also, to some extent, standardize their mind. But in that case it's an isolation problem even without AI when people check out from mass culture and entertain themselves. Wether entirely solo or in small fringe subcultures. Which is kinda isolation if you look from 19th/20th century point-of-view when name of the game was to normalise all the regional cultures into bigger bodies of people. But is such isolation the wrong or a good kind of isolation? I'd lean towards the later.
But yes, mass/pop culture as we know it would be dead. And IMO the world would be better off.
I agree with other comments that may lead to people staying inside their comfort zone. But I think it's question of time when good portion of people would start sharing that content with other people. Expanding each others' imagination. And few that don't... Well, existing pop culture is not exactly good at expanding mind as well. And such decentralized content creation may be less prone to propaganda and other social control efforts.