At point 3 you skip over the public humiliation that a published deepfake can be responsible for. By creating something and keeping it to yourself, you are basically demonstrating the behaviour Reddit wants. They want you to keep that "content" offline in your basement and not on Reddit being spread and commented on.

If that fake sex gif you made of your wife gets spread around her workplace, you better believe that would be an extremely humiliating and emotionally traumatic experience. An experience these rules will be created to prevent.