It's an inconvenience for a (in my opinion) tiny problem. The pros far outweight the cons.
I expected someone asking about scrolling an arbitrary amount. After all these years of reading internet articles and pdf manuals on Mac/iOS, I've rarely ever encountered a case where clicking the position on the scroll bar beats the speed of flickering the trackpad (and that's even excluding the precision). In fact, there's rarely an internet page where I can't get to the end within one flick.
I expected someone asking about scrolling an arbitrary amount. After all these years of reading internet articles and pdf manuals on Mac/iOS, I've rarely ever encountered a case where clicking the position on the scroll bar beats the speed of flickering the trackpad (and that's even excluding the precision). In fact, there's rarely an internet page where I can't get to the end within one flick.
http://www.theverge.com <- this is one flick
(While we're at it, yes, you can still drag OS X's scroll bar if you really want to. I've used it for pdf manuals).