" you don't have a right to other people's work, automatically, by default, for free"
Much, if not all, of this seems cultural, and inconsistent. Suppose I spend some time dreaming up a fabulous hair style. I plan to earn a living giving people this hair style. I go out and about, people see me with my fabulous hair style, and many like it. So they copy it, giving themselves and their friends the same hair style.
Do I have a supportable claim to ask, and expect, that no one may copy my hair style without my permission, without paying me? I can't imagine too many people would consider this a plausible idea, nor would many people be sympathetic.
For one, most folks would simply say, "Hey, you go out in public and people can see and easily copy your hair style! What did you expect?" "But", you reply, "just because they can doesn't mean they should."
Suppose too that I'm wearing a shirt that clearly says "Do Not Copy My Fabulous Hair Style." Does it change anything? Do my wishes regarding what I've created supersede reasonable expectations of what people are going to do, and what people think they are entitled to do?
People are constantly coming up with new things of varying originality and difficulty of creation. A turn of phrase. Color combinations in their dress or on their Web site. And no one is allowed, by default, to copy these things without prior permission and/or renumeration? That's crazy. Might as well outlaw culture.
Are restrictions on copying to be applied based on some expected financial gain? That's getting pretty circular; the gain is usually based on the expected scarcity. Are restrictions to be based on how hard it was to create something? That's just bizarre.
The arguments for not freely copying things seem based on a) the one who thinks of something gets to make the rules, and b) work should be rewarded. But there are so many instances where these don't apply that I don't see any consistent rationale other than that's just how the culture evolved based on the current technology and expectations of scarcity, plus the dictates of government meant to achieve some particular social or economic ends (as opposed to protecting some natural right).