>> I don't know how this would work out ergonomically. My dad is a cab driver and he often complains that pressing the clutch with his foot often giving him RSI kind of pain.

I think the car clutch is more related to the force required to press it - it's kind of a long, slow push with lots of pressure AND control at the same time. This seems like a button, on/off-type deal - more like tapping your foot than squeezing a clutch.