Instead of locating my mouse cursor and trying to align it with precision over a scrollbar control that is far away from the content I am looking at, I've always just wanted to flick the page up or down.
Seriously, you moaners need to give it up. We get it. You don't like it. Telling us again won't make us (or Microsoft) "get it" any better than we already have.
I think they're just lonely. They want other people to "join them" in their opinions/likes/dislikes so they won't feel alone anymore.