Your analogy is flawed. When you sit for an exam you agree not to cheat (whether explicitly, as a student who has signed acceptance of an offer to study subject to the institution's regulations, or owing to the law of the land).
I don't think anybody is arguing everything should be free and uncopyrightable. People are simply observing that preventing information flow is difficult, and - whether you like it or not - there are plenty of people out there who don't share your sense of ethics. Furthermore, much data is uncopyrightable (facts) and it's only the presentation and organisation of the data that is copyrightable. If your business can be destroyed because somebody copied your data I'm sorry to say but you didn't actually have a business to begin with.
I don't think anybody is arguing everything should be free and uncopyrightable. People are simply observing that preventing information flow is difficult, and - whether you like it or not - there are plenty of people out there who don't share your sense of ethics. Furthermore, much data is uncopyrightable (facts) and it's only the presentation and organisation of the data that is copyrightable. If your business can be destroyed because somebody copied your data I'm sorry to say but you didn't actually have a business to begin with.