Good point and on similar vein there was long article in Times on the Rugby players suing governing bodies because of the long term effects of head injuries. One cause is deemed to be professionalisation in 1990s and the simple fact of more training because the payers had more time to do so; consequently there were more drills leading to more stress and injury.I too think this analysis is plausible.
But it does make me think, are we over training the players then? Is there a point going for a marginal gain in athleticism if it increases the risk of a year long injury by a significant percentage?
Again, I think sports science has questions to answer