Maybe it would explain itself better if that said "specifically designed for writing fiction"? (lots of other sorts of writing don't have characters, for example...)
I think it would explain itself better if it explained precisely what makes it better or different from what already exists; Manuskript (open source) and Scrivner (closed source.)
The first sentence of the first non-bolded paragraph of the webpage is:
>Cheese Paper is a text editor specifically designed for writing, particularly fiction.
I don't think the HN submitter is the author of the software, but if you're just referring to the HN submission title then maybe they'll take you up on your suggestion.