Dumb Courage??

Alright I'm bored, lets get some discussion
Do people agree there is such a thing as dumb courage...
Seems AFL players these days are so professional and will be ridiculed so much if they shirk a contest that they are throwing themselves into ridiculous collisions....
Obviously there's times when you've got to go, running back with the ball etc but sometimes its just stupid and often the player is knocked out and gone for the game, which is massive these days being a man down on the bench....
Thoughts?!
And while I'm at it, with the head being protected so much by umpires it seems player are just diving at opponents legs and knees knowing they will get a free kick but in fact putting themselves at more risk, meaning the rule isnt doing skadoosh. Sometimes a player is standing there not moving and a dude unleashes a flying headbutt at his leg and he gives away a free.... whats he meant to do?
Do people agree there is such a thing as dumb courage...
Seems AFL players these days are so professional and will be ridiculed so much if they shirk a contest that they are throwing themselves into ridiculous collisions....
Obviously there's times when you've got to go, running back with the ball etc but sometimes its just stupid and often the player is knocked out and gone for the game, which is massive these days being a man down on the bench....
Thoughts?!
And while I'm at it, with the head being protected so much by umpires it seems player are just diving at opponents legs and knees knowing they will get a free kick but in fact putting themselves at more risk, meaning the rule isnt doing skadoosh. Sometimes a player is standing there not moving and a dude unleashes a flying headbutt at his leg and he gives away a free.... whats he meant to do?