...though I guess you were just reinforcing your point: driving becomes so second nature that you forget the implementation details.
At least that was my experience. I drove an automatic for the first time some years ago, and that was the only issue I detected.
The fact that you never have to move your feet from the corresponding pedals actually helps to avoid mixing up pedals.
It would be an issue in a rally when downshifts require a bit of throttle and you have to use two feet for three pedals.
With my right foot on the gas and on the brakes I can just pivot my ankle to control the pedal with my heel resting on the floor, but with the clutch you typically have to quickly press it in completely, but then slowly and smoothly release it. Which is easier to do with your heel in the air.
And race drivers can drive normal vehicles too.
Of course, they are the selected elite.
I am just pointing out this is not something that should be forbidden.