Scroll wheel input isn't granular enough for that. There's only a step every time the scroll wheel clicks. What browsers do is animate a smooth scrolling movement to not make it jump. The Logitech extension makes it so that there can be finer control than that. From the description:
The reason why Logitech bundles an extension like that with their mouse is because otherwise it's just the click wheel ticks that can scroll a few lines at a time. The extensions allows them to bypass that. Because Logitech scrolling was brought up I wanted to explain why this exact technology won't be in Cubase.How smooth is it? Pixel smooth. Without Smooth Scrolling, web pages typically scroll in choppy three-line increments. With Smooth Scrolling web pages will glide across your screen in single-pixel increments. It's so smooth you can even read as you scroll.
I mentioned that I like the scrolling in FL Studio. Have you used it? Scrolling in that is very smooth due to interpolation. But that DAW runs at native display refresh rate. Cubase actually drops below that, but I guess you didn't know that. This is why that same technique wouldn't look as nice. To make something look smooth, you need a consistent framerate.
It's nice that you accuse me of not understanding something, but here I am having to further explain it to you.