Personally I can find wisdom in 2 year olds babbling, as well as 90 years old. It depends on the person and time.
I discovered, that you can learn something from any person (even if it is, how not to do things). And age is not the determining factor.
Life is non-ergodic and the older you get the more you are over fit to a time that no longer exists.
At least youthful ignorance has a chance of actually being right. There is a pseudo-wisdom that comes with age that is almost always wrong going forward.