I got yelled at by a female graduate student for using the term "rule of thumb". The Standford page says: "Although no written record exists today, this phrase is attributed to an old British law that allowed men to beat their wives with sticks no wider than their thumb.", which I translate as "this is bullshit, but some people have decided to be offended by it".
So you're telling me you don't get offended at a phrase originating from an old story in a completely different context your friend told you that you didn't bother to fact check?
Opposable thumbs are what separate my species from others, therefore it's a huge part of my identity. If someone resists there phrase "rule of thumb", they're attacking me personally.