The only people I have seen shot in that shooting style shown in the video is innocent bystanders.
Even if you manage to get a hit while moving, and shooting that style it will most likely NOT stop the attack. An attacker can still attack for several seconds even when the heart is completely destroyed. It will take a head shot, pelvis shot, or spine shot. Chances are extremely low for a hit, let alone a CNS hit. IMO the training is in how to spend your money with the least results.
So, Pincus and Suarez are incompetent trainers according to you?
What is your general plan against a blade at 5 yards or less?
I think I probably stress the need for ECQ and unarmed skills more than anyone else on here, but I would much rather go hands on against a knifer that has a few bullet holes in him rather than engage unarmed from the get-go, although that too is a likely possibility if we're talking extreme close-quarters.