The trouble with vocalising everything is that they can't be listening whilst talking.
Having spent an hour in the circuit listening, in excruciating detail, to blogs not actually 'nailing it' and not really listening to me or other traffic.
Quite right-You cannot vocalise in the circuit and listen to the radio, to do so would be counter productive and you would in fact loose situational awareness.
Indeed part of SA is the adopting of sterile cockpit discipline in areas of high work load, the circuit being an obvious one