On the contrary Tim, whilst these things called bends will negate any clearance whilst moving, not many people will decide to get in or out of the car whilst on the move, whilst practically everyone will do this when stationary, when the benefit of an offset wheel will be felt, if the steering has been left in the correct position.
As a matter of interest my MINI has a slightly offset wheel, from standard and very useful privacy glass to the rear which stops your average thief from easily identifying my stash in the back, but you are quite right, I couldn't think of anything practical that could be achieved by sticking a piece of vinyl on my roof, so have concluded that it is merely a fashion item.
Steve if you are a big chap, I'm sure you will find some benefit from the offset wheel, and won't even notice it when driving.
