You won't truly understand the importance of it for another couple decades.
Maybe more.
It's not like there are important facts they know that you don't (well, maybe). Rather, they will have refined their understanding of almost everything.
You have experienced this sort of thing yourself.
There are subjects that as a child, you thought you knew SO much about -- and (I'm making a possibly incorrect assumption that you're in your early 20s) as an adult you realize that your childhood understanding was hopelessly crude.
And forty-year-old-you will look back on your current understanding and consider it, at best, to have been unsophisticated.
I can only imagine what you'll think when you reach retirement age because I myself, am only in my forties.
I have however, noticed smirks on the faces of the elderly and wondered what they know that I don't... yet.