My assumption was he's against the danger of using those new decoys that people grab and crawl across a hayfield or sneak through and open pasture while hiding behind them. In some instances the grass is high enough to cover a good most of a person laying flat behind one. What he was talking about with the high end decoys, is that they are starting to look so life like, that it takes a person a double look to tell if it's a decoy or not, and in some instances if you caught just a quick glance at one some people are so intent at filling a tag that they don't waste another second to look that area over to see if there is a hunter sitting there, they throw their gun to their shoulder and shoot, because your first instinct is there's a gobbler. With your attention glued to that gobbler and one eye closed and the other fixed on the gun sights, you don't see a hunter in full camo sitting there, even if they move all they see is a brown blob movement, turkeys are brown. Even the newer camo's are getting so realistic that it takes more that a quick look to see someone.
I use decoys most times, and if I have my strutter set up, I have a blaze orange hat or wrap that I wrap around a small tree at about 4' off the ground, so if someone sneaking up or even just walking passed sees that blaze orange, it doesn't effect the birds one bit, but someone can see that bright orange real easy.
IMO that was the point he was trying to make. That it's only a short time, before someone gets hurt or killed using one of them.