I'm no biologist. Just a turkey hunter. Some of my best hunting buddies are biologists, however.,been some interesting late night conversations around the campfires. The decline is obviously multi faceted...
No way to blame any one factor. I realize there are some private lands that are yet to be affected, but most public lands are down in numbers, to some degree. In this modern age of cyber scouters & video professionals, public turkeys get absolutely hammered these days. I can remember when guys would say I was crazy for chasing a bird around in spring. Today, EVERYone is a turkey hunter. I certainly miss the days of yore...

I'd be ok with losing some 'crutches', like tent blinds & decoys.