True, for real duty personnel with real duty gear.
But then there was the guy who assured the MD with a straight face that his Chicom surplus bandoleer was part of his PD equipment.
I don't recall anybody shooting in a helmet, but one of the few enthusiasts deputies here would compete in full fig, vest, retention holster, flapped magazine pouches, etc. Left his radio off, though. We had some stages to show the value of carrying a radio in the off hand and to be willing to drop it when the shooting started. But not with a real department Motorola.
He learned that the vest constricted his movements and some positions were not easy to assume.
He could get a gun out of a Level 3 holster faster than any other I have seen.