Unheard or Misheard Clearances
Does every station on the same frequency or channel hear the same transmissions at the same time ?
Obviously the answer is NO!
However Voice Communication is still very important in giving Clearances and Instructions.
There are so many possible variables involved that Readbacks of Clearances are Required.
Yet Accidents are still happening due to Misheard or Unheard, Clearances or Instructions.
In follow up comments, I propose to list some of the many reasons for this.
Disclaimer
I am not a "Professional" Pilot, however I worked on Military Avionics during the 1980s and 1990s. I also have several hundred hours experience in flying Single Engine Piston, Sailplanes, SLMGs etc.
I have operated from many RAF airfields including Cosford, Kinloss, Marham, Wattisham, Colerne, Dishforth, Laarbruch, Bruggen, Guttersloh, Wyton, Halton, Bicester and many other places in the UK, Germany, Austria, and Cyprus.