Oh, sorry, this got buried.
As I explained elsewhere (I'm just copying myself here) - It says something like "There often is a noble / meaningful sense to childish play.", meaning that you can apply the saying to children as well as adults who seem to just play, but actually do something meaningful along the way........ I thought it fit to a lot of things you might stumble across in this particular community.

"Hoher Sinn liegt oft im kindischen Spiel." (Friedrich Schiller)