FWIW even if it was FOSS I'd still care. For me it's more about intent. If your business model/livelihood relies on stealing from people there's a problem. That's as true on a business level as it is an individual one.
Doesn't mean I have an answer as sometimes it's extremely complex. The easy analogy is how we pirate TV shows and movies. Netflix originally proved this could be mitigated by providing the material cheaply and easily. People don't want to steal (on average).