BTW, when we get that relationship screwed up, we not only make the servo work harder, but we also lose the feel for that surface. The movement of our stick is so degraded that the airplane feels mushy and the precision of the servo is lost.

In other words, there is more than one reason to rig each surface with some thought. Experienced modelers try to get it across to newbies, but it's evidently just a bit too technical and it's almost always ignored.