This is why this doesn't make sense: permissive licenses offer freedom from obligations, and copyleft offers guarantees of rights. Only the latter actually describes freedom as it appears in practice.
Introduce freedom from obligations in a context where power differentials exist and it becomes a form of tyranny. Freedom exists only through the obligation to respect the rights of others. Freedom of speech is guaranteed by limiting the government's right to interfere in it, for example.
Freedom from obligations when one party holds more power than another just means that the former exploits the latter. Businesses exploit the community, in the case of permissive licenses. Copyleft levels the playing field and guarantees the same rights to *everyone*, which is what freedom actually is.