So right. When you look at Docherty doing an ACL from such a simple collision there is a lot of luck that plays it's part in injuries.I don't know how this would explain someone like Luke Parker though, who is as reckless (in regards to his own safety and wellbeing) as any player we've had yet has been incredibly durable. Others like James Rowbottom and Nick Blakey are stupidly tough and have managed to avoid injuries that have made them miss much footy.
So I think it largely can boil down to luck. Falling one way here, landing awkwardly one way there. An inch or two being the difference between a rolled ankle and a broken ankle, a hyperextended knee or an ACL, a tweaked finger or a fractured finger.
Maybe your comment belongs in the unpopular AFL opinions thread