The elderly should be advisors not kings.

[Trexller]

I'm pretty sure that the association of wisdom and age came from a time when everyone died at 40, and there were no books/written word or the internet

without these sources of knowledge, everyone who had managed to live a long time and learned about the world bit by bit over their experiences would seem like a genius god.

These days elderly folks are actually at a knowledge disadvantage compared to younger people, given that all knowledge flows through tech devices and old people are much less adept at their usage.