Maybe your reflections could also apply to Latin, history, geography,
foreign languages and a host of other subjects for which the future
'world citizens' are made less and less prepared by their parents and
our schools. Or, could it be that evolution and progress make these
field obsolete or irrelevant, replacing them by more contemporary interests
such as computers, astronomy, etc.in which classical music plays no role?
Enjoying classical music - besides just hearing it - requires some
'culture' and that seems to be on the way out.