"We've made our position public, and we're satisfied that
its an accurate reflection of our position and our
understanding of Australian law. You must not rely on it as a legal basis
for anything though"
Or put another way, I don't think "Your Honour, FastMail's lawyer said it was ok" is valid defense for anyone except us.
My point is that you have given advice, with the implication that it would soothe some of our concerns. And then, in the very next sentence, you've said, in effect, it's legally worthless.
So, how exactly does your own advice to us help in any way whatsoever?
So, the point remains: what value does this advice have over against the advice from Google, etc? It's a rhetorical question, by the way.