You get gifted priority picks every year because the AFL knows the Swans can't afford to miss finals more than one season consecutively or they'll be back to the 1992 death rattle.
Tell me more about this "cheating"
I don't think you know what the academy is if you are comparing it to a priority pick. Also "every year" is a massive massive stretch. The Swans only have 4 academy players taken inside the first round, and that is over the course of over a decade at this point, all of which (other than Heeney as it was a different system back then) the Swans paid quite a bit for. They were not free.