I guess one could demand to exit the plane, but this would then result in a forfeited ticket (if exiting is possible at all)
There are many countries where "demanding" will not get you anywhere, except perhaps the local prison if you get on someone's nerves with your "demanding".
Their playground, their rules.
In such places and situations, it's always best to relax and go with the flow. If you don't like that, then you probably shouldn't be there.
However, saying that to visiting businessmen from Europe and the USA, in Abu Dhabi when it was still a new experience for many, when their schedules got upset, often seemed to make them crosser. I have no idea why.