Sidestick makes a good point.
One day while joining the circuit I shut down the engine on a Harrier by moving the throttle (which has a fat handle) through to HP cock off instead of selecting max reverse thrust by moving the nozzle lever (thin handle) all the way back as I had intended. Lucky for me the Pegasus relights reliably and quickly.
In the wash-up with the pilots and designers nobody was surprised I managed to put my hand on the wrong lever as they are side by side in the same quadrant. What nobody could understand was how I got the HP cock off when this action requires a finger lift of a catch on the front face of the throttle, while to get reverse thrust you have to lift the whole nozzle lever up over a stop. Two totally different baulks.
My view was that once I had put my hand on the wrong lever then the habit patterns kicked in and I was going to do quite ‘automatically’ whatever my hand was used to doing with the thing it was holding in order to get it all the way back.
Just one reason (of several) why the left hand only has one handle/control/inceptor to operate on the JSF STOVL version.