Content creators can't make money... yet! Video content is expensive and difficult to produce because it has not become widespread enough for millions of people to actually be doing this.

For example, compare Word Processing to TV editing. Anybody can use a word processor on a PC...now. At the very start of things, a word processor on a PC was a specialised task. As the market grew, things became more automated and a lot easier.

YouTube and such are only a few years old. The software to make producing content really easy is not there yet - so there is still a lot that needs to be done manually. This software will improve and content production will get cheaper.