If you want to talk about property rights, we can talk about those. But we're talking about copyright, which is a very different concept to property (despite attempts to create misleading terms like "intellectual property" to muddy the waters).
Copyright is supposed to be a method of encouraging creative works. It is not meant to be a method for software developers to maintain control over their users. I never said licenses were not important: YOU SAID THAT. Licenses are incredibly important -- free software couldn't exist without them because of draconian copyright laws funded by special interests that don't give a shit about creative works.