Really? What are the trivial demographic trends?
Also, it's emotionally threatening to say that they're suffering the ravages of ageing meaninglessly.
Most people can't imagine what a world without ageing would be like, and they can't want what they can't imagine.
I have to agree with Lumifer -- most people can imagine (and want) a world without aging, because they would not bother to think about the demographic trends. I would compare this to asking someone to imagine a world in which no one was living below the average income level; I think most people would agree that this is easy to conceive of, and desirable. It's only the select few who would think this through and wonder how the powers that be are going to achieve this without doing something very drastic to a lot of people.
Another month, another rationality quotes thread. The rules are: