I think we need to distinguish between charging people money for access to knowledge and charging them for personalized guidance in seeking that knowledge.

I personally believe all textbooks and courses should be free. But if a tutor is going to dedicate an hour of her time to sit down with me and help me learn, it is not unreasonable for her to demand compensation.

Universities, of course, are only able to release MOOCs for free because they make money from tuition, alumni donations, endowments, etc.