The market is dominated by large publishers. They do not need to compete, they have already won. At the same time, they don't want to loose the marketshare, which makes them less likely to bet on an unknown author.
The market is dominated by ebooks. Trad publishing gets a few home runs, but overall can't compete with the sheer volume of new independent books that come out each year.
Supporting evidence?
Trad publishers + a savvy agent will make the author rich. A successful ebook will make Amazon rich.