Your job is to say to yourself on a job interview does the hiring manager likes me or not. If you aren't a particular manager's cup of tea, you haven't failed -- you've dodged a bullet.
There will not be an NRL that will sign a contract that doesn't have a clause in it that states they can leave if they get a head coach gig in the NRL. That is just a chance GH has to take if you want to choose from the best coaches. Look what happened to Graham Murray