I think there's a disconnect between what you and the person you're replying to are defining as "tinkering". Your conception of it seems more focused on the end product when, to use your analogy, the original comment seems unconcerned with the size of castles.

If you derive enjoyment from actually assembling the castle, you lose out on that by using the wand that makes it happen instantly. Sure wand's castles may be larger, but you don't put a Lego castle together for the finished product.