I'm not the guy you asked, but...
I kind of think of it like services - mowing the lawn was the example. You may not have anything physically taken from you if someone asks you to mow their lawn but doesn't pay, but you're out your time. If someone takes your software without paying you, you're equally out the time you invested into making it, and time is money.
It's a tough subject for me to wrap my mind around when it comes to theoretical money damages from theft, but I definitely feel if someone takes something without paying for it, and it's required to pay for it, there's a loss there.