I agree what Mr Joyce said may well be correct, but he could have left any comments to the gent from SYD airport management so the latter would receive any flak from travellers, or sensationalism from media.
I also don't disagree with your frustration in queues but the median age of Australians is increasing. On leisure routes in particular there can be many aged 70 and over. Some won't have the mobility of younger people, although fumbling for items at the last minute when they ought have them ready doesn't help their cause.
Not many read your continual pro-QF (or defensive of QFi/QFd) comments either, because AFF is a specialist website whose reach doesn't extend to a high percentage of all air travellers. (It may have higher reach among frequent air passengers).
But we have to get back to the s--thouse discussion.