As the old saying goes, "Don't judge a book by its cover."

As far as I'm aware, the cover selection for books during the publishing process is entirely independent from the choice to buy / publish the book and it will be a whole different team working on it.

The converse also applies, where good books are given bad covers and so don't capture the interest they deserve, sometimes leading to the author being dropped by the publisher because the book didn't generate the sales they were expecting.