I think the way the "free information" people see things is that a free and easy, attractive accessibility of knowledge (or more generally, information) is needed for anyone to truly prosper in their life, and for humanity to progress further as a whole. A physical good (like food) is not reproducible at an effective zero marginal cost -- digital data is. So, when you in fact can provide everyone this resource, and work to achieve a world with true equal opportunity at least in this one aspect (of knowledge) at a practically zero or near-zero cost, you are indeed morally obliged to distribute this good to everyone who will prosper from it. As it stands, culture is no longer free -- to be able to participate you must pay. The more you are able to pay, the more cultured you can be. Books, movies, music -- you can have only as much culture, knowledge as you can pay. Why... when it's finally gotten so much easier to afford everyone culture and information for free, or near-free costs.