Here in ye olde Europe (and I believe the same for the U.S.), it is unfortunately common to see extremely young, as in literal college students, parliamentarians -- most of them handsome, well-spoken and opinionated; and some also coincidentally the children of famous politicians or businesspeople :-)
All governments, democratic or despotic can only govern with the consent of their subjects.
It's thus reasonable to dislike the precise mechanisms by which that consent (explicit and implied) is achieved in any particular country.
I'll have to look more into the 'seasoning' islands full of slaves in the Caribbean during the slave trade years. IIRC they were treated as bad as you can get, were the majority, and didn't consent yet practically didn't overthrow their dictator in most circumstances (Haiti might count as an exception).
That's the definition of a despotic government - ruling without consent. Any rule comes from the end of a gun.
I.e., your statement is translated to "that large masses of possibly unqualified people choose wrongly qualified people as having power over other people, with important regard to people in their right mind". It is not a value; it is a concern tackled in systemic planning.
The Constitution was largely written as a departure from the monarchical British system. By not allowing presidential candidates younger than 35, this would prevent hereditary transmission of the presidency. Past 35, a candidate is more likely to stand on their own merits rather than their family or connections.
https://constitutioncenter.org/blog/why-does-a-presidential-...