My thought about "steering input" is that any cyclist is strong enough to produce vastly more steering input than can be used without crashing, when riding under normal pavement conditions. We can, and must, apply a limited and varying amount of torque to the steering axle, that also depends on speed and other conditions. So we're already adapting, or we'd be dead. Now the handlebar is doing other things for us. It helps us to stabilize our own body position relative to the bike, and to manage the weight distribution between the front and back wheels. Those things all have to do with control of the bike.