I think it really makes no difference for the steering wheel. I've never been in a situation where my left hand was in any way inadequate to the task of steeri

I think it really makes no difference for the steering wheel. I've never been in a situation where my left hand was in any way inadequate to the task of steering my car. (Well, one case: when driving a heavy vehicle at low speeds with no power steering. But in that case, my right hand is also unable to steer it on its own! Getting the truck out of the parking lot is a two-handed job.) My intuition is that I would generally prefer to keep my left hand (less dextrous) on the steering wheel (only one moving part, controlled by big sweeping movements), and use my right hand (better at fine motor control) for tasks involving moving/pressing/twisting smaller controls.