i am not defending his wheelies. You are right, it is possible to go easy on the gas and the front end will not lift. Perhaps this was his first track day, most of normal riders including me won't excel at cornering right from the bat. Takes a while to build the confidence you need while cornering to really lean it enough to keep speeding in corners.
But i mean, getting kicked out of a track day because you lift less than 2 inch?
This might be his fun to go hard on the throttle. I personally like acceleration better than speed, a track day should be a pretty good place for that.