I practice with it on and leave it on while hunting.
It's called consistancy and taking any variable out of the equation.

I have had 2 accounts while hunting, that I've needed a second arrow in my hand Due to my inexperience when strating to archery hunt and hitting branches.
Moral of this story is clear your lane(s) and only commit to the choosen lanes, as during the heat of the moment or @ dusk, you can not see those tiny twigs in your arrows path.

I would hate to have additional movement at an inopportune time, like needing a second arrow.
As Forrest Gumps said... S*** Happens!