Zach's point is different. It's about making a connection, establishing commonality and empathy at a human level. Carefully chosen profanity can be a branding tool; it can establish commonality with a certain group of people, and depending on when it's used, empathy too. Just about all of us swear when we accidentally hurt ourselves, for example; if we were acting that out and didn't swear (no matter how mildly), we'd seem more fake somehow, like we were pretending to be invincible or something.
And Zach has his "brand", it comes fairly easily to him, more easily than other approaches. If it turns off people who don't have that in common, that's OK.
And that connection is what in turn makes richer communication possible than dry exposition.