This truth is a two part truth, not only will you kill all of the little bucks so none are left to mature, but an even more insidious truth also exists in the present. Mature bucks often let other deer, including smaller bucks, lead the way. A mature buck will often lag behind other deer to see if it is safe to approach any objective. The young ones are simply cannon fodder for the old guys. If the other deer scatter, or show submissive postures, when a buck walks out, chances are you are looking at the dominate buck in the area.
Mature bucks are certainly the most challenging to hunt.
In fact, he holds an animal equivalent of a Ph.D., in human behavior. Genetics are a many faceted subject. It is also the subject that most hunters are interested in. Of the three requirements for large antlers, genetics is the hardest to control. In my opinion, all other factors, such as overall herd nutrition, reproductive success, age and sex structure must be fully addressed, before any attempt is made to initiate genetic culling.