There's always different ways of doing things in audio, so you can't assume someone's doing their job wrong just because its not how you do it.
In my mind, I'm doing sound for a rock band, and the singer has for the first half of the night consistently provided a threshold to open the gate which I've set. But then a song starts where he sings something very softly, and its not opening the gate. I at FOH, 100ft away, hear the gate not opening in the mains and make the appropriate adjustments and lower the threshold (or temporarily turn the gate off). If his voice is gated in the monitor, he may have an "oh crap" moment and look at me because he's thinking he got accidentally muted. He might even stop the band to signal me, hey I'm muted! And I have to yell in the monitor, "nah it's all good man the gate wasn't opening for a second or two. Let me explain to you how gates work." Hehe I hope that makes sense.