B15
I get what you mean now. I didn't intend it to be taken that the chap in the back had no influence on flight safety. All crew members have that. The issue I have isn't about about who decides what the aircraft should be doing and where it should be going in order to keep it safe, it's about how it's handled in order to do that ie hands on the controls.
My point is that if the brand new pilot gets his x-wind landing/whatever wrong the only way for the experienced pilot to avoid an incident is by having access to the relevant controls. By putting the inexperienced pilot in the LHS on the 'J' this ability is removed and no-one else can have an input.