That doesn't mean that you can't be critical! But critical comments need more care—first, to make sure that they're informative, and second to make sure they're free of swipes and putdowns.
https://news.ycombinator.com/newsguidelines.html
I dare say that this is particularly important in Lisp-related threads. A constant caution to those of us here who love Lisp and related topics is what happened to c.l.l., a community that was once one of the richest in computing and then self-immolated because a few people, for whatever reason, decided to normalize behaving like assholes. So on HN, on all programming topics and especially on Lisp ones, people need to treat each other kindly and share information in a spirit of helping, not putting down.
(Also—please don't create accounts to break the site guidelines with.)