QDM is about managing the herd. In a way to have a good buck to doe ratio, but to also increase the genetics of the breeding deer with good habitat and feed.
Wisconsin really began the QDM programs that work everywhere with simple rules. Good feed, good cover, good bucks left alive initially, and taking enough does to keep the buck to doe ratio low enough to promote daytime movement of bucks.
You should hear the guys who live in the Buffalo County area and how they deal with bucks. Low potential bucks are culled often. They hurt the QDMs goals and have to go. As time goes on, there is less and less of a need to cull the smaller bucks because the genetics of those who survive are the ones with bigger racks.
ARs are useless because they look at one aspect of hunting. QDMs can work if the people who participate in them look at the big picture. Which typically is the case in Wisconsin. It's why we harvest so many large racked bucks every year now in certain areas of the state.