usually the hard roll induced by loosing a wing will prevent the ejection system from functioning, or black the pilot out with

of gs, or at thev ery least make it difficult to reach the eject handel. then theres the matter of timing it right, even if the system works, you want to be sure you triger it when youre pointing up otherwise you would reach the ground

sooner than expected. at ground level the ejector seat is supposed to give you enough altitude to enable a safe chute opening with plenty of time to decelerate. so if youre only at a couple thousand feet, and you eject inverted, there goes your safety window.
instead he put his plane into afterburn. the extra surface pressure on the plane helped stop the roll. then he determined that his plane was still controllable. and why waste a n airplane if you know you can control it and get it home. nort to mention who would want to eject at that speed?