If the word fuck isn't offensive, there's absolutely no reason to use it.
Yet every culture across the globe has and has always had swearing, profanity, taboo words, fart jokes, and gate keepers decrying such things.
While the reasons may elude, the ubiquity speaks to something foundational.
Fart jokes are popular in US. Mostly.
If casual use of profane and taboo words isn't offensive, are they really profane and taboo?
Non homogenous population response says both Yes and No
no one is challenging whether "fuck" is offensive, we're challenging what powers the mild abrasiveness of a single word actually gives people in controlling behavior.