To me this signifies the very core of society itself. Someone made this flute, meaning, they had the time to imagine and experiment. Meaning, they played a different role than hunters or foragers of food.

This was probably a gift to someone (concept of love / family) or some higher ups (strata / class in society)

And, the reason only a very small sample was found was because someone had the idea, tools and time to probably fashion one out of wood, as it may be more easily workable.