To people who choose not to swear (for non-religious reasons), what is your motivation to be that way ?

I do not publicly swear, I live in a place where practically everyone does, I am young, all my friends do, but I don't, mostly, because I like to be soft-spoken. I have publicly swore maybe less than 5 times (even these are when I am very angry, someone swore, and I just repeat how can you say ***). Plus this elevates even the impact of me saying something like "stupid person" (in my native language) as if I swore. I do swore in my mind, mostly from having it as a part of my vocabulary (I do know how to swear (pretty good) in 3 languages, and a bit in 3 more), but I maintain good filters, and just helps me do natural conversations, so I dont have to think of my statements when I say it in front of my friends, or elderly