The only reason you can use proprietary or free/open source software is that you have a license. If you do not respect the license, you lack the authority to use the software. That restricts you to software that has passed into the public domain. What OS and applications do you use?
Commercial software exists because the authors are financed by license sales. BSD licensed software exists because the authors use the attributions required by the license to justify educational grants. Free/open source software exists because some programmers like the requirement that if someone else distributes modified versions of their software, the modifications have to be made available for anyone to use.
Almost all software exists because of copyright law and licenses. I have a great deal of respect for the people who created licenses. Because of them, I am able to earn a living, use some excellent software, read interesting books, watch films and listen to music without requiring musicians to be present.
Get a clue you freetard.