I find almost exactly the opposite is true. As you age your perceived value lessens, while you find the nuances of human behaviour ever more fascinating. Meanwhile many of the current cohort of twenty somethings seem disinterested in everything, including one another.
Over time most of the people this age in my extended social circle kind of... faded. I don't know what caused this but I find myself increasingly socialising with younger people because they still haven't retreated to the comfort of their "me time" activities.
The cost is that when you are 40 and you either have stable finances such that you can provide your kids with an acceptable amount of healthcare and education and housing stability, and you will be able to retire, or you get to 40 and you have to start sacrificing the goal of raising kids within the aforementioned parameters.
Maybe that is how it always was, it just wasn't a "known" thing so people didn't incorporate it into the decision making when they were 20.
The average person perhaps. I find as I get older that people become more fascinating to me. Maybe I've just gotten better at listening and identifying interesting things about them.
I'm not American, but I was meaning to visit Altoona, PA as, according to one person living there, it was "the most average town in US". Unfortunately Luigi Mangione put it on the map, so it most certainly lost that title by now.
Joke's on you, OP - even being like that you'll still find people who think you're boring because it's subjective.
Truth is, once youth passes, over time people become increasingly disinterested in others. This effect was exacerbated by the recent pandemic.
You might be a genuinely fascinating and authentic person, yet all that is going to fall flat in a crowd whose reaction to going outside is "ugh, people".
What really works is showing genuine interest in others. It's such a rare thing in this day and age that many are surprised when they experience it.