I’m decently sure profanity became known as such because of either religious reasons or class division (along the lines of peasants vs nobles from early/medieval europe) and it just became commonplace.
I would say profanity nowadays though is a lot less taboo. It’s been normalized in culture (hip hop, city culture, punk subculture) and a lot of people are less religious nowadays.
I used to get a daily dose of tea from aita and tifu
It’s like reading a drama but for some random person’s life somewhere on the planet