They spend half of their life working for survival, preparing and planning for their (!) future.
Some people die in the process and never live to see that future, but some people reach that point and become aware of the finite time that just elapsed.
Having physical needs met is trivial in our society. Everything beyond is self imposed suffering by comparing oneself to others.
But for what purpose? Just to have more than someone else? Just to be better than someone else?
Nobody truly cares. Nobody cares about how fancy the technology is that someone built to make people click more ads online - even if that someone thinks he is doing god's work.
We came to this earth naked and we will leave naked. Just like my parents did. Any material possessions and people will be left behind. Most of us will be forgotten 2 generations ahead or end up as UTF-8 characters on wikipedia.
I can at least walk joyfully in the present and not suffer my imagination about the future. I can also make a conscious choice to not indulge in activities that destroy the planet for others. I don't think the older generations see it the way I do.