Well, a book's cover story is just a marketing tool and doesn't always reflect the depth, quality, or complexity of the writing inside. Many hidden gems have unimpressive covers.
You shouldn't judge a book by its cover story because it can be deceiving. The true charm and substance of a book lie in its characters, plot, and the author's message, which you won't know from just looking at the cover.
Because the real value and content of a book often go beyond what's on the surface. You might miss out on a great read if you make assumptions based on the cover alone.