...maybe your trackpad driver is broken or misconfigured? My trackpad uses cursor acceleration, just like a traditional mouse does.
If I drag my finger slowly all the way from one side to the other of the trackpad, I get maybe 20% across the screen. But if I move it quickly even halfway across the trackpad surface, the cursor moves all the way from one edge of the screen to the other. So it's just as easy to hit the side of the screen as it is with a mouse. Easier, perhaps, since you don't need to move your hand as far.