I have a different perspective on this issue BT.
Brett early on in his career at Richmond "never wanted" to become captain, not because he wasn't any good or would be terrible at the job, but on a personal level did not want to do it.
Newman was not going to last forever in the job, we did not have an adequate replacement for Newman, Brett was the obvious choice but as i said he wasn't the slightest bit interested in it.
When Cotchin came along it was recognized that he had the potential to be the man, to fill the position, to be an adequate replacement for Newman, so Cotchin was primed for it. So that is why he beat Lids into the position, Lids did not want the position and of course Cotch ended up with it.
Of course Deledio has matured a lot since those days and I believe regrets to some extent not taking the position or at least making it known to the officials that mattered most in such decisions that he was willing to assume the role.
I have no doubt that he would except the role today if circumstances warranted it, but he is happy for Cotch to be the captain and would never rock the boat.
From my point of view i think you are being a bit harsh on him BT.