If you don’t have an air traffic controller to confirm that the radio is working, you would be pretty stupid to design a system which relied on radio for the required level of safety.
Civil Air would be pretty happy with that.
You are the fundamentalist, stuck in your 1950s USA time warp, not knowing what goes on in the real world, desperately holding on to an outdated, inflexible airspace labeling system. Let it go, Dick.