The powerhouse of the cell. You know it. Everyone your age knows it. You also got the quadratic formula, the state capitals, and a diorama of a mission or a longhouse depending on your region.
Here is what you did not get, anywhere in thirteen years of school: what a death certificate is and why you'll need ten copies. What to say to a friend whose mom died, and what not to say. What actually happens at a funeral. What an executor does. What hospice is. How to sit next to grief without changing the subject.
So you learned it the only way left. Live, at your first funeral, in an itchy shirt, guessing. Or at 31, on the phone with a funeral home, googling "what is a burial vault" in the parking lot. Every adult you know took the same crash course, alone, on the worst week of their life.
That's not a personal failure. That's a curriculum gap. And the numbers say it's not a small one.