Traditional publishers are picky and famous for giving 1000 rejections for every acceptance letter they write. No book submitted to their editors escapes careful consideration and the process of being picked apart for worthiness.
Why? All in the name of promoting quality. But frankly, they have a point. There should be a mechanism to control the quality of books being published for general consumption.
But then, what about all the great books that proved to be great successes only after the author resorted to self-publishing to ever see the book in print? Does the chance that more true gems will be brought to light by publishing their own work justify the risk of book markets being watered down by shoddy writers?
Hmmm. What do you think?