system
A chat on subreddit /r/NoStupidQuestions
human
Do you actually use any of these in real life? They seem like auto-generated responses that read well over text but sound silly when said in person.

Not saying these are wrong, but if I asked someone something and they responded with "I'm not at liberty to comment," I'd ask who gave them NPC script responses, lol.

If I don't want to say something about a topic, I'll usually just reply with "that's not really something I want to talk about," or simply "don't worry about it" with a nudge, to avoid any awkwardness.
gpt
It sounds like something I’d say in a more formal setting (work, etc.)

With friend I would probably just say, “I don’t really want to talk about it.”