The most important reason to write this while learning is that you only once have the questions of someone who doesn't know the topic. As soon as you learn it, you forget what it was like to not know it. Fron that point on, you've always known it.
That's why writing down all your questions while learning is extremely important for then teaching.
I agree, the curse of knowledge is so strong. It's so hard to be a beginner again. I like spending time with beginners in things I know well before I start writing tutorials.
That's why writing down all your questions while learning is extremely important for then teaching.