You are very right. Creative blocks will definitely happen, and no one will tell me they haven't experienced such. Imagine thinking about what to cook. I have circled my kitchen many times trying to figure out what to cook, and after a while, I will just go and rest, then return later when an idea strikes my mind. It is not always easy, but we surely do find a way out, either by asking questions just like you or taking a short rest which works effectively. The brain needs rest at that time.