I've had as many as 17 deer walk in single file past me at less than 10 yards as I leaned against a fence post.
I can believe that, I have even had deer almost walk into me while I was wearing a plaid flannel and blue jeans. But, that is when I am remaining totally still. Any movement and I would have been busted.
Drawing a bow (as well as getting into position) requires movement, and if I happen to get busted, I don't want to stand out, but blend into my envirement. That is why I stay on the safe side, especially with deer andUV.
You may want to put it down and call it crap Dave, and I know that is your opinion. But, there is logic to my opinion also. It's a shame however, that we can't agree to disagree without calling others opinion crap.