Not only can you not make that material available to the general public, but when you leave the school, you can't deliver that course anymore. Contracts of many schools prevent your teaching online courses for any other institution. As usual, we see an enormous gap between what's technologically possible and what actually happens, a gap between what you see in labs and in the news and in trade shows, and what becomes widely adopted and changes how we learn and work and live. It's the age-old gap between the possible and the real. Only what people use will change how we learn and work and live.
Technology stimulates the imagination.
Marketing changes the world. The human barriers to change in distance education are normal, natural, essential elements of everyday reality. You may love to teach, but you don't teach just for the love of it. You need pay and security and predictability. You need to be able to build a stable career and put food on the table for yourself and your family.