Well, there's also another thing: according to empirical research, "explaining things" about language doesn't make you better at that language. The part of your brain that handles language is simply incompatible with that kind of input data. (The input data that makes your brain better at language is comprehensible linguistic input embedded in communicative context. That is, language that is trying to communicate meaning to you, and is simple enough for you to get the rough understanding of that meaning.)

Not that it hurts, though.