Saying you are doing and QDM and then actually doing it are two different things. Maybe those 80% of property owners really are not.
On our property we always see many more young bucks than mature bucks. In fact, since APR's have been in force, nearly 8 years I think, we have only taken 3 deer 140 class or above. The older a deer gets the more wary he becomes, and that more than any reason is probably why you are seeing all the young bucks and fewer of the mature deer.
I now hunt two properties, one in KS. and one in MO. and the quality of deer is very different on the two properties yet they are only about a hundred miles a part as the crow flies. I do not think it has much to do with genetics, but rather the types of food they have to eat. The MO. deer have nothing but crop fields around them for miles, corn and beans with some wheat. They grow very big. The KS. deer have plenty to eat, but most of it is pasture for miles around. In fact there are only two small bean fields within a couple of miles from our property. The KS. deer have neither the body or antler size the MO. deer do, and KS. has a much more restrictive buck quota.
Keep passing on the young deer, rewards will eventually follow.
“There are two spiritual dangers in not owning a farm. One is the danger of supposing that breakfast comes from the grocery, and the other that heat comes from the furnace.”