I think most of us in tech do. There are people who rail against how open-source software is "stealing their livelihood", but I think most people realize that there is nothing immoral about people choosing to write open-source software. If the only way you could earn a living is to wish for the non-existence of free software, then you just need to find a new line of work, because you can't wish it out of existence...
At risk of putting words into your mouth, what you're saying here is "some software is open source and that's ok". I couldn't agree more - I've even made a few small contributions to open source projects myself. But the way I read the parent post, it seemed to be saying (the equivalent of) "all software should be open source", which is something quite different and which I disagree with quite strongly.
When the price of copying and disseminating work is lower than the price of the royalty, a royalty is what people will not pay, never mind full price for the original. It's a simple as that.
Would you apply the same argument to your own line of work?