I mean maybe it is just me but I am guessing a fair number of people do the same thing I do, which is just show up in crucible to just get more chores done, northing really more. You go in, in order to finish up bounties and such, and get out as fast as possible. Heck I ran only the new exotic grenade launcher (which I am by no means good with), for almost every game save for maybe the last couple because I was just getting the grenade launcher crucible kills done for the catalyst. If I don't have bounties to do, I don't tend to touch crucible, and so there is little to no incentive to actually play it "properly". Mind you I still tend to capture points and such, because I figure I might as well, but I presume that many don't bother to do so because they are entirely focused on getting their chores done.