I don't disagree with your assessment, but I absolutely disagree that it's an acceptable standard. If I am going to use a weapon to take a life, even an animal life, I personally feel obligated to take the necessary measures to be 100% confident in my ability to take the shots I choose. To me, that means practicing with gun I am going to use at the ranges I am going to be using it. Yes, mechanics of shooting should be honed to a razor's edge, but until I have shot X rifle at 400 yards, 600 yards, 800 yards, etc... until I know, through experience, how it drops, how it bucks the wind (or doesn't), I'm not going to take a shot at an animal at that distance.