Yeah I'm always shocked at how frequently it's used by my colleagues. I will say it is used in a lot of non-writing disciplines, but I remember my first English class putting that thing in my hands and ugh.
It's part of a broader issue in writing instruction that mistakes etiquette for style.
Amusingly, the original PEP-8 had "When writing English, Strunk and White apply" rather than "applies" (so treating "Strunk & White" as a plural). That subsequently corrected to "When writing English, follow Strunk and White".
S&W is a series of misinformed and inconsistent stylistic preferences that mediocre English majors use to status signal to other mediocre English majors.