> In contrast, children will copy every single action, including the unnecessary ones.
I watched the video, but I'm unconvinced. They tell the kid the box is "magic". Children know the box is not magic. Children know how spells work in cartoon and books. So "magic" is a code word for "please copy all the silly steps as accurate as possible".
The apes have no instruction, so they don't understand the must copy all the silly steps.
I'll also blame school. Children are expected and trained to follow orders of adults even if they don't understand them, because it will be better for them in the future. Did you ever played basketball? Why should you put the ball in the basket if it has a hole in the bottom and the ball will fall down?