The main reason your comment (https://news.ycombinator.com/item?id=45160084) got downvoted was because you gave a summary without disclosing it's AI-generated, which made other users upset.
But even if you did disclose, it's still against HN rules, as other people in that thread told you. You commented "they’re free to delete it. I think it adds value", but as you've seen the community disagrees.
The guidelines are out of date and they don't mention anything for or against AI comments. Having your comment flagged makes the number of upvotes irrelevant.
People often upvote comments that are contrary to the spirit of HN.
And for better or worse, lawyering the guidelines is not in the spirit of HN. Better because moderation is generally patient, kind, and soft touch. Worse because the guidelines are guidelines not so much bright lines and some people want bright lines.
But even if you did disclose, it's still against HN rules, as other people in that thread told you. You commented "they’re free to delete it. I think it adds value", but as you've seen the community disagrees.