My parents both didn’t swear (at least not where I could hear them) so I simply never picked up the habit. I can swear if I make a conscious effort to do so, but generally only find reason to if I am quoting someone or something. And even that feels awkward to me.

As for expressing myself, I don’t believe I have much trouble in that regard. There are a ton of other words available and ways to arrange them. And if I truly need to express anguish, rage, etc. there is always yelling or screaming.