Your movement will be much more restricted when you're a para/quadrapelegic.
I used to use just a safety belt, now it's a safety harness. I'd feel naked and vulnerable up a tree without it. I've never needed to rely on it, but some of my hunting friends have. Using it for a while will get you used to how to make it most effective without restricting you too much.
You're probably right!! And let me state to anyone getting into hunting that I DO NOT promote not using a safety harness. I think everyone should use it and get used to it from day 1. My problem is I never have been able to. I'm going to try during the offseason when I practice. I have a wife and 3 kids to think about. What's the best/most comfortable one to use? I've tried the Gorilla harness I think it was called. I just can't for the life of me get used to the thing.