Most likely because sarcasm isn’t really encouraged here.

On that note, there’s another rule about not commenting on comment votes as well:

>>> Please don't comment about the voting on comments. It never does any good, and it makes boring reading.

https://news.ycombinator.com/newsguidelines.html

FWIW I agree with you, but the rules do seem mostly effective in general.

Anyways, welcome to HN!