Ofcourse it’s ok- way faster reaction time to brake.
uh… - if your brain can’t tell what your left foot is doing while using the right, then you have bigger problems. I always drove stick shift, and when I moved to automatic, I got scared trying to drive just with one foot.
The left foot is on the foot rest till is called to action - the right foot knows what the left foot is doing - at least for most people - and eases the gas pedal - pretty simple.
Yes, they don’t teach people to drive in th US - just to operate the car - quite different