having a moment here in gnome
to everyone pointing out that this is for touchpads;
a: it's awful on that too
b: note the mouse in the example given
It's supposed to mimic how you scroll on your phone. Fine for TouchPads (depending on when you learned to use it(i.e., if you learned to use a touch pad after learning to use a smart phone then it would make, slightly, more sense)), abhorrent for mice.