When somebody tells you this same line, "proprietary software created jobs", tell them "so did marijuana".
Okay, maybe that's too absurd to describe what proprietary software is in our community. But the fact that a business employs people does not excuse misconduct in its business practices.
Drug dealing was never made legal, because it's a common knowledge that these illegal drugs kills people. But how different is proprietary software? What made it legal to sell proprietary software?
Is it because it doesn't kill anyone? Well, it does and it did. It just killed the very human in us, to care for others who won't have the chance to use it.