I think the biggest problem hunters have is trying to reason out what a deer is going to think in a human sort of way. Instead they need to try to figure it out using the deer's perspective.
Me and another old man were sharing a lease with two guys about 20 years younger than us, and did so for several years. Our camp was about 400 yards from the hunting area, and me and the other oldster would ride our four-wheelers directly to our deer stand every morning and every evening. The two youngsters complained we were running the deer off, and ruining the hunting.
I pointed out to them that me and the other relic were killing three deer apiece, in about 3 days, and they were lucky to get one all season. Then I explained that the rancher who owned the lease, fed cattle out of a pickup, and the deer had learned not to pay attention to the vehicles. Also we didn't spread scent on the ground when we rode to the stand. Everything me and the other geaser did was actually business as usual as far as the deer were concerned, but that two men stomping thru the woods in camouflage was what was unusual, and that was what was scaring the deer away from the area they hunted. They never grasped the concept, and we eventually lost the lease anyway.
If our forefathers, who were very successful hunters saw the way we dressed they would get quite a laugh. I don't think my grandfather who was a full blood Cherokee ever saw camouflage, and he was a heck of a hunter in his day. But then again all he ever owned in the way of guns was a very old leveraction marlin 22 with a octagon barrel, and an innertube strap running from the forearm to behind the hammer,(the hammer spring had long ago broke) and a single shot 12 Gage. Simpler times, but they worked. I don't think camo will ever replace patience, and common sense when it comes to hunting anything.JMO