ive done quite a bit of off roading with my mowers and found that unless your running a gearbox for your steering if you hit anything like a rock or stump it whips the wheel preety hard with that said i would not use anything but a wheel the result could be broken fingers
True, hitting a rock or log with direct steering CAN pull the wheel out of your hand, but if the direct steering is setup properly to give you the right amount of leveral on the linkages and spindles, you wont have much(if any) problems with it. Think about most quads, theyre mostly direct steering with the right about of leverage.
-Phil