At a certain level of abstraction, yes.

You can't understand human behaviour by reading a physics textbook.

Of course not. One of the major differences between intelligent and word-guessing autocomplete.

Do you think you could explain all AI behaviour by reading a physics textbook?

Nope. But someone smart enough could.

How the neural networks produce such surprisingly human characteristics is an open question with a ton of research going into it. Explaining this is a bit more than what one smart person can achieve.