Hookless rims have been around since they were made of stamped steel. High pressure is where the conflict lies.

Tires can and do blow off the rim today, just the same as they did in 1972. Above and beyond all the modern advanced in manufacturing tolerance improvements, over pressurization is the constant. Nothing is user error proof. With due care and consideration, the worst that will happen is a return to the risk profile everybody simply accepted as "normal" 40 years ago.

Hooks didn't come around until everybody tried stuffing 100-120+ psi into a tires on 70 psi rims in the search for free speed.