I highly, highly doubt that the AFL manipulates the whole thing like a deep state actor - if so, Buddy Franklin would have gone to GWS.Petracca was a passive aggressive little child, neither publicly came out and nominated a club? There was conjecture, but nothing from them?
Regardless, for every 1 in your example there are 20 of mine. Do you really think we have a real trade period? I have a coastal property near Uluru to sell you if you believe so...
Neither Petracca nor Oliver came out to publicly nominate a club because they knew the chances of getting there - particularly given lack of picks on behalf of their target clubs, Collingwood and Geelong - was minimal.
I absolutely agree that player managers are a blight, and not enough players are held to contract, but just because most players who come out publicly get to move, that doesn't mean the AFL just chooses it all.