This attitude, IMO, is why so few learn to apply the buddy system or team diving techniques correctly. Nothing works if done poorly. An instructor diving with prepared students in a correctly organized class need not dive solo. I am not solo when I teach.gazzahawkes once bubbled...
Going solo is a case of self efficency...
Instructors simply cannot rely on novice experience in a situation that may develop subaqua, In effect instructors dive relying on themselves only..