That being said, it is not easy to communicate the "reason" we do certain practices, like standing still. I'm glad I didn't ask a lot of questions about the purpose of standing still when I first learned it. The truth is I made a bunch of assumptions, some of which were actually wrong. Fortunately in my case, I got help and figured it out. Most people hang on to their false assumptions (or their teachers misleading explanations) and end up disenchanted. (And here I mean both definitions of disenchanted.)
I'm not convinced that someone can understand the reasons for standing still until they have done it without fail for at least a year. Understanding would at that point emerge spontaneously in conversation. Perhaps I can sit here and type out a brilliant explanation of standing, but the truth is, it's too simple for that. The purpose of standing is that it reveals what we actually are.