If he doesn't think Hawthorn or Adelaide are interested then i understand, otherwise I think it's dumb.He doesn't have to nominate. He can go into the draft and if a club bids for him as an eligible F/s, both Hawthorn and Adelaide have the rights to match the bid under the points sytem. Thats how I understand it anyway.
Irrespective, he's likely going to go late anyway - they suspect 4th round - and there's no guarantee either club will pick him up. I think it's smart of him to be open minded about it as he just wants to play AFL like any other kid.
It's like participating in a lucky dip, except someone has pulled out the two best prizes and all you need to is choose one you will get it. Instead he puts them back and insists on trying his luck.