Excuse me sir, this was a hilarious quip and not a shallow dismissal. Probably my comment is still against site rules in this case, but it was lighthearted and delightful, not dismissive.
Jokes aren't against the rules but they have to be pretty good not to count as unsubstantive comments. Most people overrate how funny their jokes are. See https://news.ycombinator.com/item?id=7609289.