But this is exactly the type of reasoning that this silly quote leads to. That simply having less makes something better.
Apple could easily make a computer with no keyboard, no mouse, no OSK, no visual display. Simply a touchpad, to input a binary code that corresponds to text and numeric output that corresponds to what color and x,y location to draw pixel. Of course, this numeric output would simply be a binary light. But that's just stupid.
The reason you add something is almost always because there is a goal that you'd like to accomplish. Yahoo probably thought you should be a click away from your email account. Google doesn't.