My TV has tons of buttons on it. I only use one though: the on/off button, and the remote control. I don't even understand how the other buttons on the TV work. As far as I'm concerned they don't exist. Yet, they do, and when I accidentally touch them, I'm freaked out.
My TV also has S-Video. By default this is hidden. First of all, it collects less dust this way. Second, why show something normally not used?
This is an analogy why simplicity is sometimes better, and how a complex UI frightens a user.