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.

What use are buildings if they aren’t closed spaces? If they’re open, then you’re open to the elements and/or wild animals, and at that point it’s not a shelter.