Publishers have been telling each other for years that eventually people will tire of being able to produce and share amateur content, rather than just consuming professional content, but the users don’t seem to have gotten that memo.
True. I have never heard a book publisher or editor notice that almost all important books have been written by amateurs. Charles Darwin didn’t write books for a living. Nor did Thomas Paine. Nor did Betty Friedan. I think this is why books have been so influential.