Re: How indeed
I have pretty much the same feeling. When, not so long ago, I first drove a vehicle with simple cruise control turned on, I felt my right foot not being on the accelerator pedal meant I wasn't ready to respond to conditions on the road should I need it to. There would be a delay, potentially fatal, in my reactions. It was then I figured there were only two states of vehicle automation - totally manual or totally autonomous. I believe that's 0 and 5 in the levels of autonomy as they are currently understood. The only exception I might make is for emergency braking, but I'm not even sure about that as it still requires accurate identification of what constitutes an emergency.