What focus means is saying no to something that with every bone in body you think is a phenomenal idea, and you wake up thinking about it, but you say no to it because you’re focusing on something else.
Simplicity is not the absence of clutter, that's a consequence of simplicity. Simplicity is somehow essentially describing the purpose and place of an object and product. The absence of clutter is just a clutter-free product. That's not simple.