I think the idea is that once AI "solves" a game mode it becomes easier for humans to get better faster by learning from the AI and therefore less fun. For exa

I think the idea is that once AI "solves" a game mode it becomes easier for humans to get better faster by learning from the AI and therefore less fun. For example, chess players used to practice (or invent) novel openings to surprise their opponents. Now that AI has explored such a huge range of the game space it can simply show you the optimal moves for each opening. So for humans there's less exploration and more memorization. You're simply trying to follow a path that AI has paved rather than find a new path. It's kind of like how tic tac toe is fun as a kid until you discover how you can tie everytime. Even with these new rules AI would rapidly find optimal strategies that humans would then race to replicate.