Until recently not many hunters were interested in shooting past 500 yards, where BC doesn't matter nearly as much.
In fact out to 500, muzzle velocity is just as important
I was going to post the same thing, but I didn't wear my flamesuit. I agree, BC doesn't really start to show its advantage until 500yds+. And I don't plan in shooting at big game that far. Wind and BC is another theory though...