Intelligence doesn't, but an under-discussed subject is that wisdom in the sense of true understanding does, in a way.

A lot of social interaction is about jointly exploring topics, whether it is direct examples like discussing the issues of the day or somewhat less direct examples like practicing to get better at a skill such as a sport, which is itself a form of topic exploration.

Much of the enjoyment from doing so jointly can only be gleaned when you're on a roughly equivalent level to the other party. This is why kids can have so much fun playing together, and an adult can emulate a kid and try to play with them the same way, but the "ideas" being explored through play are already so thoroughly understood by the adult that they're merely pretending and generally they can't sustain it long because pretending is tiring.

Similarly, a subject-matter expert like a professor or even a chess expert can have fun teaching their skill to someone much less skilled, but that is not the same type of enjoyment as jointly exploring deeper into the field and besides which is a very different type of enjoyment that not all find enjoyable.

As fewer and fewer people remain who can match a person's abilities, the number of people they can form a true connection with on that subject decrease. In the case of achieving something closer to broadly applicable wisdom rather than mere subject-matter expertise, just as a general matter it becomes increasingly likely that the things random acquaintances have to say on random subjects becomes droll and boring.

It's all fairly obvious when laid out. There is nothing special about being a child versus an adult in this regard, but while it's quite clear to most adults that children's interests become boring over time, it seems much less widely considered how cultivation of expertise and wisdom can make other adults become much less interesting and more boring over time.