Because it's faster than being nice?
But seriously, the first hit is from Apple's own website. I don't see why I should have to write out everything when it's already there, from the horse's mouth. I replied 20 minutes after the OP, that was plenty of time to use my friend the search engine.
People are getting like this because the same questions are posted every damn day. Not only that, but the thread title "Really dumb question" is really vague, so some people won't even bother looking. Perhaps the question should not have been Does it work, but (after Googling), Does it work well, in our experience.