Yes, your authority fallacy. Rather than relying on demonstrable facts, you leaned on your role as a trainer and student. It means nothing.
What's your typical bill drill time?
That's false. Training longer strings negates that inconsistency. That's the point. You're not doing a 2.0-2.5 second bill drill if the gun gets away from you on longer strings. It's a good skill to have, especially for competition shooting, but it certainly has self defense application.
Longer strings of fire highlight deficiencies in your recoil control that 2-3 shots might not. For example, with a handgun, if you're firing doubles and milking the grip between each set, you won't really see how poorly you're resisting movement in the gun. For an evaluation like this, he was...
Lowering the round count for matches seems to help participation, but that puts more stress on match directors to invent interesting, challenging stages that require less ammo. I don't envy them.
I rented the one at VRA as well. I was excited about this pistol beforehand, and planned to buy one. While it functioned well, it wasn't very quit and easily had the worst trigger I've ever pulled. I won't be getting one until there are some improvements.