Yeah but no but yeah but.
As has just been stated - Us commercial pilots have to 'manage' the flight. My management head says "Busy airspace, over land, constant R/t on primary frequency - more chance of danger by screwing up a clearance, autopilot changes required due level/heading changes due busy airspace - THEREFORE - Turn off box two with 121.500 and leave it to D&D to monitor or any other less busy crew member flying and use box two ONLY when absolutely necessary"
Isn't this Risk Management?