Wow. I honestly haven't heard this much "Waaaaaahhhh" in years. Seriously. The ENTIRE POINT OF A SCOPE IS TO ZOOM IN TO BE MORE PRECISE IN YOUR AIMING. If you're not actually zooming in, but rather just flashing the scope up in front of you before you shoot, then you're not using a scope, you're exploiting a bug within the game. The fact that it has become so prevalent within this particular game is not a plus in its favor. If you have to cheat to be competitive and everyone is cheating, joining them so you can be competitive too does not make it right. This is like if you could backstab people while standing in front of them in Team Fortress 2. Half of every team would be spies and they'd run around stabbing each other all day, and I'm absolutely certain that if this went on for a year or more, then when valve patched over it to stop the exploit, people just like the "quick-scopers" of this game would cry endless tears about how valve "ruined" spies.
Why would anyone quick scope? What possible advantage does it hold over just using the weapon without zooming in? Because it somehow does more damage. Ask yourself about that for a second. If I shoot you in the arm without aiming, is that supposed to do less damage than if I had shot you in the arm with the exact same bullet but aimed to hit you there first? No. The added damage is meant to emulate a sniper who aims his shots for vital areas of their opponents body. The way you're using the scope would, if a sniper used it that way, not provide that bonus at all. You're not aiming to take someone down, you're exploiting a bug that gives you that bonus even if a sniper could not have done what that bonus is meant to emulate. There is a reason why S.W.A.T. teams aren't just a pack of ten snipers thrown into close combat situations.
If you're upset that they are forcing people to stop using sniper rifles as if they were assault rifles, it's because you have gotten so used to cheating that you can't imagine life without it. Grow up.