Why wasn't this obvious to Facebook that they should give away a minor's account to their next of kin? Unless there was a will written saying to the contrary?

Why wasn't this obvious to Facebook that they should give away a minor's account to their next of kin? Unless there was a will written saying to the contrary? And it SO ARROGANT of Facebook to think they own the data to such an extent where they can effectively deny access to the data from the person who produced it, or in the case of death, to the next of kin.