This is kind of the theory of QDM though. That big nice mature buck that is 4-5 years old that has very good genetics has bred and produced many offspring that are now 2,3,4 yrs old now and are on there way to becoming nice deer and have also bred and produced offspring. You are almost classifying young to be bad genetics. There is a difference. Where people mess up is by letting that 4-5 yr old 5 pt that is all jacked up walk and shooting the 2-3 yr old 8 pt. I say mess up loosely. I don't know just my opinion, but by taking only mature bucks will make your hunting process harder for a few years and you might not even get to harvest a true mature buck. But, after that there should be lots of mature bucks and a greater likely hood that you get a shot.