The more "typical" use for a feature like this is drawing tablets and touch screens. You don't necessarily want a touch/drawing tablet input to move your actual "main" mouse cursor.
Wayland has a separate wl_touch type that is also associated to a wl_seat. So that use case can be accomplished on a single seat setup.
Wayland has a separate wl_touch type that is also associated to a wl_seat. So that use case can be accomplished on a single seat setup.