You are entirely correct, sir. I really don't know what I meant by that first bit. I mean, I write pontless swears in dialogue all the time. When it makes sense in context and/or it's part of the natural patterns of speech for a character it works. In fact, intentionally leaving out casual swears can make things worse. Like in a lot of Hardboiled novels from the early 20th century - you just knew the characters should be dropping F-bombs all over the place, but the publisher was muzzling them, and it felt wrong.