Patsy, with respect to "why hasn't this problem been solved," I think it's important for people to remember that the question may be asked as, "how can I provide a solution to this problem in a way that is more accessible to my audience, and that provides value in a new and different way from that of other content providers?" The upshot is that there are a lot of sources for content online, but not all of it resonates with your audience. When you know your audience intimately, you can speak congruently with them.