There is nothing wrong with it. He just didn't know what it meant after using it for a little over a month.
At work we give a 16/17 year old, work experience over the summer. He was using chatgpt and not understanding the code that was outputing.I his last week he asked why he doing print statement something likeprint (f"message {thing} ")
Ahhh, I finally understand trickle down economics.