I had a teacher in college who was writing a book about Emily Dickinson and he believed that everything she wrote was about sex.

He shot down anyone who got something else out of a poem of hers, and it got to the point where students just went along with him so their grades didn’t suffer. Made for much less interesting discussions (for me at least) with the same people talking about sexual symbolism and the rest of the class not sharing their interpretations for fear of going against the “accepted” themes.