Fisher Information is under the "Kindergarten" section?

Maybe I've just been interviewing at the wrong places, I'd be very curious if anyone here has been asked to even explain Fisher information in any DS interview?

It's not that Fisher information is a particularly tricky topic, but I certainly wouldn't put it as a "must know" for even the most junior of data scientists. Not that I wouldn't mind living in a world where this was the case... just not sure I live in the same world as the authors.