@jb747, thanks for all the great technical info. And I want to be absolutely clear that I'm not being flippant or cynical about safety or legal requirements. Never. I know my vision isn't what determines these outcomes.
And I also don't want to argue, or labour a point that I can't prove. But there was an announcement specifically about the seat. We heard the last bit clearly, which was 'we're fixing the seat so you have somewhere to sit'. So we assumed that was a safety issue itself, and fair enough if it was.
But others confirmed the start of the message only referenced the wine spillage. That just seems weird. At the time this announcement was made and we were waiting around, a couple of VA aircraft were still departing.