I honestly think they will let him walk unless it is a genuinely "fair" trade this time.
Like you I am sure a trade will get done, but the Lions are setting this up to be "fairer" than you'd expect in a situation like this.
At some point it isn't about Aish, but about the next three Aishes. At some point you wear the short term hit for the long term.
How exactly does it help prevent the next 3 Aish's?
The only thing it could do is deter kids from even wanting to be drafted to Brisbane. You'll have more kids saying don't even bother drafting me.
Once they get to Brisbane if they want to go then they'll go won't they?
To stop players going you need to find good players and win games and build a strong program. If you turn down a pick in the low 20's then that doesn't help do that, especially when you could use that pick to get an academy player.