By your logic a person is unmotivated and has no work ethic just because they haven't a big B.S. tatooed on their forehead.
No, you're reading something that isn't there. Lack of proof of a claim does not constitute proof of the contrary. In other words, having a BS is evidence that you are motivated. But not having a BS doesn't mean you are not motivated. And no reasonable employer would think this, but that doesn't keep them from going with the safe bet, the BS.