Let's put it this way: if you don't understand the game, you can't play it.
Meaning — even if you've stepped onto the field of reality and rented your first apartment, if you haven't internalized the rules the world actually runs on, at some point you'll bang your head against the wall and order yourself heaps of unnecessary suffering.
Young people in your twenties — I'm talking to you.
You may read this as a condescending post, and you're half right. But the question I always recommend asking in any interaction with a human being is not "is he annoying?" — it's "is he right?"