Don't worry, they will always have new Minecraft mobs and biomes to discuss.

They can just sit in the corner with their meta glasses and talk to their LLM friends.

This is already the case with the myriad of streaming services and choices of what people will let their kids watch or not. With my little kids, we tend to mostly watch PBS Kids content with a bit of Disney shows mixed in when it comes to screen time. We try to avoid seemingly empty hyper-stimulating content like Paw Patrol and others. But in the end a lot of the other kids in school/daycare talk about these shows and others, which can lead to the kids not having that kind of shared context. For instance, my four year old loves Wild Kratts, but practically nobody in his class knows the show. Meanwhile, he doesn't have any context for the various characters of Paw Patrol.

Assuming you have to generate new content for each viewer second watched yes it won't pencil out. But if you have a library of tons of content you can keep building out...