It's probably because of HN's anti-LLM filter. I don't know if submitters use LLMs to touch up their descriptions or if these descriptions often use LLM-like phrasing.
> (deliberate, not a port artifact)
Smells like AI
I guess you folks are right and it's probably the llm filter. I looked at the GitHub and thought it had too many screenshots to not have had some human effort, but who knows these days.