Your experience and expertise seem trivial to you because you've been living with and accumulating them steadily over a long time.
To someone who wants but doesn't have them, however, they seem impressive.
Think of a young child wondering how adults get so tall.
They may silently wish to grow taller, dismay (erroneously) at how they'll never get that tall, or loudly demand a shortcut (no pun intended) to attaining their desired height.
Short of a miracle, genetic mutation, or painful surgery, they, like you, have to accumulate growth a little at a time.
The good thing is, unlike height, your wisdom can be imparted easily and readily.
You just have to want to enough.