I would too. When playing in the AFL you want someone to have AFL traits. Parker is bigger, faster and can impact more defensively. At Aarts height, he needs to have something that's elite, either footy smarts, agility, goal kicking. Unfortunately he is a poor mans Sam Lloyd, and Lloyd was an average AFL player at best (and I loved Lloydy).
I have no idea what the coaches see in Aarts to think he has any AFL traits. At his height you need something elite in you (think Baker, Prestia, Lambert etc) but I can't of anything that is elite about Aarts.