Butkiss didn't know any better because no one lifted weights back then. Butkiss would not be what he was then in todays game without some form of strength building. Pretty much everyone lifts weights in the NFL now and they have to. You think it's easy for lb's to shed the blocks of 300 ol's....or for ss' to tackle guys 40 lbs heavier than them?
Weight training is a huge part of the game now and if they knew that then they would have done it more. I should say strength building is a big deal now, because it's all about functional usable strength.