Why? He had not only skills advantage, also speed and agility advantage then. Cos speed kills and agility is big factor here. Well, 29-32y.o Usyk I think was better than bombs eating sanbagged and protected by Don King Ali, sorry lads, Ali then was cash cow, protected PUPP from 70 ies. Bit^^^^^^^ even had dragged Foreman to Zaire and Frazier to Manila to prove how cool overrated Ali is in 70 ies. While vs Ali from 60 ies? I think Ali from 60 ies was better than prime Usyk while Ali from 70 ies was most overrated boxer world ever had.