It is definitely like it because it can't be enforced. No one can tell if your singing in your private bathroom so a law covering that makes no sense.
AI generated comments can also be verified and caught in many ways. I'd guess that it's statistically more likely for a murder to be resolved than a random AI comment to be detected but I'm not actually sure. There are a lot of sloppy murderers (since it's rare for an individual to have _practice_ at it) - but there are also a lot of sloppy LLMs.
Well the laws against murders also often have punishments/repercussions associated with them. HN guidelines? Not so much