To play my own devil's advocate, my perception is that the barrier to entry into politics, i.e. money, has risen substantially which prevents younger candidates from even running for office.
Every one of these representatives is there because they got the majority of votes.
Don't stand by but make yourself heard. It happened in the 60s and can happen now.
Basically the hippies got us out of 'Vietnam slightly quicker but they carelessly threw the poor and the non-white under the bus to do it.
Nothing is permanent.
Again, if you look at things with a long enough timespan, nothing is permanent.
Besides that, many changes are permanent. The passenger pigeon will literally never darken the skies again. It's gone, permanently.
We are patiently waiting for the dinosaurs to die out. They will die, and then we will move into their homes.
Or was he warning us?
Work for a lobbying group. Work for a non-profit. Volunteer for an organization that encourages people to vote. Protest. Donate.
There are plenty of things that people can do regardless of their age.