Because it helps you learn. You can tell someone a brief answer to memorize, but to teach them anything takes a little more explaining. For example, Question

Because it helps you learn. You can tell someone a brief answer to memorize, but to teach them anything takes a little more explaining. For example, Question #1 is often "how do I do this in some particular way", but 2 and 3, "why" and "when" should I do it that particular way -- they take more explaining than #1 -- and through that explanation, you start to get good at your craft.