Yes that is how i scroll now, though it is a very straining method (middle button = middle finger) and for some reason i really can't hold that mouse button pressed with that middle finger for very long ;(
Though it is certainly not a fix as "edge" scrolling is a method that requires no buttons, and thus is vastly different (in scope of action) as say, arrow keys or middle button (or zoom, which is way too drastic a nudge ;p)
Reminds me that middle button scroll also should be an toggle (not a hold+drag, but press once and release and drag) as pressing the button is a bit different (and a lot less straining) than holding it.