Strunk and White’s Elements of Style has a soft spot in all our hearts, but some of its rules—no adverbs, an incorrect definition of passive voice—are a little…idiosyncratic.
If, as Constance Hale says, the point of grammar is to produce better writing, rather than squeezing words into an airtight mathematical equation, Strunk and White aren’t always super helpful.
In fact, if this Book Riot post is any indication, they would have sapped the life right out of the titles of some classic novels. (But we would totally read Wrath Grapes.)