I see that you have been inspired to downvote. Interesting.
This is a pretty silly-cal conversation. "Facts and opinions are different things." was only a minor facet in circuitfarmer's reply anyways. https://en.wikipedia.org/wiki/Subjectification_(linguistics) literally turned many sentences into opinions. If we're really gonna look at these from a lingusitics standpoint, there's nothing that indicates if it's an opinion from just syntax analysis. It's only because we often associate "5 stars" and "worth" with opinions that it looks like an opinion.