Just wanted to throw in something about racing wheels. It's actually the pedals that create the advantage of use, not the steering wheel proper. With practice players actually develop a ridiculous level of accuracy with an analog stick for steering. A foot modulating a pedal is far more precise than a finger trying to work an analogue trigger, however, the same way flicking a mouse is simpler and more precise than fidgeting with a stick + trigger + adjusting to camera spin at the same time.
It's not really comparable in terms of player results, either. Starting to use a wheel rig won't magically improve your skill in a racing sim. You might learn a little faster + it adds on top of already talented players and lets them go that little extra distance for a second faster a lap. You have to already be good--Knowing the tracks, cars, tuning, physics of racing, etc to get true benefits. I'll use my time in the GT Sport beta as an example-- I do better with slower cars because they rely more on steering accuracy than throttle adjustments. The high-end racing machines almost 100% require car assists turned on or on higher to keep moving even in a straight line with the standard controller for various reasons. Yes, it's theoretically possible to be as accurate, but that's beyond superhuman for all but a few people.
It's possible to have maybe 3-4 pressures built in to muscle memory for the throttle trigger, but that's still nothing compared to continuous variable control and precision on a pedal. It would take a controller with adjustable pressures in the triggers and manual input acceleration settings enabled to get to that same level, and even then it wouldn't be as good. Does it upset me that putting in the cash for a wheel rig could make me faster? Marginally, maybe? But since I understand what my own limits are and that 90%+ of what I get out of racing come from a baseline skill level that no one can replicate without experience I've never once been frustrated that I won/lost anything because of my input method. Combined with smart matchmaking that will continue to promote the fastest players and it's a total non-issue for me.