Basically anything Chat GPT spits up can be found through extensive Google searching, right? If it gets you where you're going, saves you a bunch of time, and doesn't make you feel like your own creative work has been negated, then I don't see why it should be disallowed!
Winning or losing TweetTweetJam is subjective, and how you get over the finish line is up to you. If you feel that using Chat GPT doesn't break the boundaries you've set for yourself, then go ahead! It's on you to decide. :)