David - So are you claiming that 'only' Resonant Current
Flows to ground ? ;-) ~ RHF

FWIW - There is a lot of Dipole Antennas out there
free floating above ground that must not be working )

IIRC - The Antenna Input has a characteristic impedance
50, 75, 300, or 500 Ohms. Subsequent to that the internal
circuity of the Radio can be Resonated to Select and
Amplify an RF Signal and then process it into an Audio
Sound that we can Hear.

yes it is that simple ~ RHF