Sparta had its gerousia, the council of old men (gerontes). There was an assumption in the ancient world that old men were experienced, and even wise!!!
In every culture and every country, the only benefits of getting old was knowledge and wisdom, because of getting more and more experienced.
Only in our modern cultures, young people have everything (youthism) and are always right because they're young, and old people just wait to die. That's sad. And unfair. I don't know in your country, but in mine, the respect toward the elderly is lost. They are only senile fools now, when they are not considered as children.
But on the other hand, that's no so far that senators are old senile.
Me too. This man has a different pronunciation: https://www.duolingo.com/dictionary/Latin/senes/d35d121a4f5f3725adb2a2408e8b13fd