It isn't really a matter of supposition.But I don't understand why you both suppose a non-plumb pole in north/south direction should be more of a nuisance for motorized setup, than for fixed setup.
With a fixed dish, you get it aimed and your done.
When you put a motor on it, now you have to concern yourself with the fact that the motor only moves the dish in one plane. If the plane is tilted, the dish won't sweep the arc that it was designed to cover. In the best of situations, it crosses the Clarke Belt at two points and all of the rest are either high or low. I suppose you could compensate for a True North tilt by jacking the elevation on the motor, but why not make it level so you don't have to mess with it? It is all about reducing the variables. Getting a motor set up is difficult enough without having to compensate for being sloppy with the one frame of reference you have control over.