I... with the evocative scenario... would choose another remedy, rather than have a nurse steady the drunken surgeon's arm.

I think that's the point. If you have an incompetent team or team member the number of checks around them can grow astronomically and still you will have problems. At a certain point the systemic problem can become "the system is unwilling to replace this person/team with a competent one".

(That said, this is only in the case of persistent problems. Everyone can be inattentive some of the time, and a sensible quality system can be very helpful here. It's when the system tries to be a replacement for actually knowing what you're doing that things go off the rails)

:P I mean, obviously assuming you don't have the choice of changing your testing team. But even if you do, what if they're worse?