To a degree you are right, but there is a reason why some players rarely get injured when others do: DNA, training methods and style of play. The great LT was said to never lift weights. Does that mean not lifting is the answer? Does that mean for him, he was better because he didn't lift, or would he have been even BETTER if he had? It has been mentioned that Fat Boy Woodley didn't touch weights last season - how did he do again? How often did Jerry Rice or Walton Peyton get injured, to a degree where they missed game? Almost never. If Ben would hit the weights a little bit, would he be better or worse? Injured more or less?
People will continue to search high and low looking for reasons for injuries. Football is a sport where injuries can't be avoided regardless of the training. The human body wasn't made to endure the punishment that happens out on the football field. The answer is right in front of people and they are still blind to the facts.