I’ve only driven on one banked oval ,, most of my driving was sports cars .. but everything I know and have heard suggests that the straightaway of a dirt oval being hard packed ... the car would not have turned with the steering wheel , there was nothing for the tires to bite into , just plowed... especially at low speed with no downforce available from the wing.
One thing everyone seems to forget is that it takes about 300 millisecs to comprehend what you see and another 500 to reposition your feet and operate a pedal ,, hitting the brakes was NOT AN OPTION...
Stewart likely saw the kid late with the wing and other visual obstructions... the only thing he could have done was what he did ... if he could do it over he might have used MORE throttle and hoped to point directly at the infield or even spin/flip...
I've seen another still shot where his right leg was even further down the track. Wonder if he slipped on the wet surface. Just a horrible accident I believe.