To continue my car trip analogy - you tell your mate to keep his eyes on the road but he doesn't, and crashes due to being distracted, does that make you guilty?
Hird played a role, nobody worth listening to is denying that, however his role is massively overstated thanks to Caro's agenda and the AFL's decision to make him the scapegoat.
Good on you for fighting the good fight but your last sentence is a guess. Hird's involvement could range from having nothing to do with it to being the instigator/ driver of the program. Making statements as though they are fact when you wouldn't know is nonsense and diminishes your argument.
It is why people have a desire (well I do anyway) for this court case to be over to just know the facts of what happened and what ASADA has if anything. There are people understating his involvement and others overstating it, but the truth lays in the evidence not with key board warriors like us all stating things as though they are facts.