Most VFR aircraft are not fitted with ADSB. How then does the controller know where the VFR aircraft is located?
Increasing numbers have ADS-B, in any case there are things called SSR transponders.
Just one call at the wrong time could over transmit an important ATC instruction.
If it's important, the essential elements are read back, or the controller repeats the instruction.
Thank God, end of discussion, thread closed.