While it is possible to drive with both feet (YES in an automatic) without riding the brake, it really isn't recommended. Why? Because when things happen, people tend to panic. If you have both feet above both pedals and you panic, it's possible to just mash both of them down without even thinking about it.
I'm not picking anyone out specifically, but the body does funny things sometimes while in panic mode regardless of how well you think you've trained it. The 'best' way to drive IMHO is to use one foot for gas and brake, and anytime you're not accelerating, keep the foot above the brake pedal.
85 chrysler 5th ave....the rear driver.
coming up to the intersection........left foot on the brake, it's stopping, then suddenly the pedal drops to the floor. no biggie.......pump the pedal, yank the shifter into low gear(auto), left foot off the brake onto the e-brake.
was pretty easy actually.
i've been driving like this for 31 years.
if you're accustomed to it, it's much much faster to get your left foot(which is doing nothing normally) onto the brake, rather than release tension on the gas pedal, pick your foot up, then place it on the brake pedal.
would i recommend anyone switch? hell no!! that's how ya get into trouble.
would i train a new driver like that? in a heartbeat.
most of the accidents that come from older people, are generally them pressing on the go pedal, rather than the stop pedal. left footed braking would totally prevent that.