Do you honestly expect users to swap out the window system to solve a simple problem like a lack of scroll speed adjustment?
Most users won't even know the difference between Wayland and X.org and X11 unless they are already the kind of tinkerers who used Linux on the desktop despite its drawbacks. Normal people have no idea what any of it means, and they should not need to know.
I'm talking specifically about OPs complaint - they've identified it's a Wayland specific issue, so yes? If using Gnome, it's a single click from GDM, and your preference will be remembered.
Most users won't even know the difference between Wayland and X.org and X11 unless they are already the kind of tinkerers who used Linux on the desktop despite its drawbacks. Normal people have no idea what any of it means, and they should not need to know.