I have absolutely no problem with profanities being used in this game. However, I also feel that the 'fuck' specifically is too modern (even though I know it's an old word). All other variations of profanity or swearing just seem to fit better. And I would also like more setting-specific swearing (Like "by the tits of Tymora" and variations thereof).
Maybe you could play the game in your 'safe space'
I am not offended by the curse words, its just not following other D&D products, that's all. I really think it's the only D&D game out there with those words. It's a case of immersion not my poor delicate soul, that can't handle this bad, evil, mean meanie pants words. To me, as someone who played most if not all the PC D&D games, I never encountered it before before, and I really think that so far those games handled things quite nice without resorting to this. I understand that this words are old, this is not my point, because the forgotten realms is not earth's past. It's a totally different wold and universe.
The old games, and many other games were able to express mature content and events without NPCs calling you fucker and bullshit and fuck you. It makes the writing feel cheap and infantile.
