No the argument isn't silly, the original premise that there are hoards of expats so a flight could be justified is what is silly. Simple fact is there isn't and other airlines have much better options and would kill a single flight a day route to Australia from another airline.
Don't follow any of the logic here. We were talking about CX to from Dubai to Hong Long, why would someone fly via Dubai to get to Hong Kong?
You are very wrong I have done many. When doing so I don't expect to be on the same airline all the way.
Bzzt all my points were 100% valid. If one is going to Berlin and want's to fly Air Berlin they will want to fly the shortest possible route, which is NOT via Dubai. As for VA my logic is not floored here, unless I am mistaken they are in a code share agreement with Ethiad, so more or less have full access to Ethiad's network via Abu Dahbi and vice versa, so the flights make perfect sense.
If Qantas could tie up with someone and gain access to their network then yes it would make perfect sense to have flights, hence my comment that if the Middle East is to be a Qantas destination it needs to be Amman to access Royal Jordania's network, or they need to forge a closer relationship with either Emirates or Gulf. Cannot see either of them happening anytime soon.
Doubt Jetstar will fly to Dubai anytime soon. At the end of the day it is a place people go to get somewhere else. Sure some may stay and for some it may be an end destination but for the bulk it is a via point. Same too with Abu Dahbi and to a certain extent Singapore. Geography is an advantage the middle eastern and SE Asian carriers have that Qantas can never hope to have. We are more or less at the end of the road, not a hub like those airlines operate out of.