Why can't pax accept what they're told without assuming they're being lied to? Who would come up with a specific line like that if it wasn't true? get real! What advantage would the airline get from it? Makes no sense at all.
Knowing the trouble and difficulty it takes to get any kind of info to pax in an airport I think it's pretty impressive you've got that much, and for it to be so specific doubly so. That. to me, makes it convincingly true.
I'd have thought the term "software update" is a term well enough understood these days, and if you aren't thoroughly familiar with all the software and it's associated procedures on a modern airliner how are you in a position to doubt it's importance?
Why can't they? Use your imagination to think how many dozen reasons there might be...And as a non airline person how could you presume to even guess a tenth of them? Perhaps the bloke who does the updates is off shift, or the disks are at STN, or there are no couriers available, but why does it have to be bs?
:ugh