If we're contributing anecdata I have used LLMs to tremendous effect to learn all kinds of interesting stuff because I like learning interesting stuff and LLMs can tailor the level of instruction to exactly where you're at and don't mind questions interrupting ever 6 seconds which is better than both textbooks and teachers, mostly.
Have you ever tried to do the thing you learned without the LLM holding your hand?
Or are you just assuming you learned something because you made a finished product of some kind?