My view is that kids are exploring and loving the world. Adults are support mechanisms for kids (and elderly). But we have been stripped of community and if you happen to not have kids, you can be even more isolated. Being around (free) kids is a great way to feel meaning in life.
Adults are driven by our evolution to be useful to the community. Games are designed to allow humans (particularly kids) to master skills. Adults ideally should have already mastered much of the needed skills. Hence games cease to be interesting the more one gets older (in general -- there are always plenty of exceptions).