Why a Mouse Wheel is Better Than 2 Buttons

Why a mouse wheel is better than 2 buttons

Scroll wheel is much better than buttons because it's easier on the fingers, and far easier to make a back and forth input firing. This is particular suited for many commands that has a prev / next pair, such as switching prev/next window, tab, app, virtual screen, or page up/down, or undo/redo.

Think of it this way, as a physical device. E.g. We have 2 buttons we can press. With a scroll wheel, you can press 1 button faster than if it is actually a button, and can immediately stop, with fine control, no accidental push.