I don't get the issue, I swear at real people more than I swear at AI in fact. That's because I don't use virtual assistants, and have a particularly foul mouth.
I think this is somewhat funny, I don't think it reflects how people treat other people though, because the key distinction, and why people might be more willing to swear at their Alexa or Siri is purely because they don't have feelings to hurt like humans. If nobody gave a shit, everybody would be swearing way more than they already do, which would be impressive considering how much the average person swears.