I agree that it's better for that post to not be on LW, but banning such things is not standard procedure, and people don't like it when moderators do surprising things. In particular, the post didn't have more serious pathologies sometimes present in other posts (that are usually still not banned), such as hosting a bad prolific discussion or getting downvoted to minus 20.

(If I were to ban posts on the grounds that I consider them bad for LW, I would ban maybe a quarter of Discussion posts. I don't have authority to do that, and don't expect good consequences unless the procedure is accepted by the community on some level. This doesn't seem likely or even desirable in the sense that there are better alternative procedures such as weighted votes, which would have less blind spots.)