agree
The workload can be very high as an instructor.
I have been involved in a few close calls.
It's sods law, that when you take your eye from the outside world for a few moments to sort out a student, thats the time when someone creeps up on you, or each other.
I have had two very close calls in the circuit when people have joined in the wrong place/wrong height/wrong side. Or the w@nkers that join crosswind while you are way down the downwind leg and try and cut in.
As I rell my students " if you asre given number 5 to land and you cannot see everyone...ASK"