The analogies you’ve used don’t stack up.
For any given regular hotel room category, the vast majority of hotel rooms are identical if not very close with the exception of floor and view. That is to say, the hard product (the room) is very close to what can be expected as advertised in the picture. If it clearly is not the same room you booked, you can talk to the front desk and ask them to do something about it. Escalate to the Duty Manager or chain Loyalty etc if the outcome isn’t appropriate. The difference here is that there are many reasonable avenues to address the issue with a hotel then and there in a professional and responsive manner. The same can’t be said for Qantas or their call centres.
No one is going to disagree with you about the how Hamburgers are advertised/presented in reality. But for $5-10 are you really suggesting we should also take this matter to their Head Office/courts and claim false and misleading advertising? I’ve got better things to do with my time than chase $5 over a burger. But if we‘re dropping $2-3K for domestic and $10K+ International on the expectation of a fully flat business suite (vs 737 recliner) then yes, there’s everyone reason to pursue the matter. The disparity of advertised product matched with the eye watering prices are a 1-2 combination that few would stomach.
If you accept and defend every misleading and falsely advertised product or service that you consume or purchase, then your are exactly the sort of Lifetime Customer that Big Business wants.