That might be true from the law perspective, but a major objection to copyright filters is that they go beyond the requirements of copyright law and ignores fair use. Youtube filter being a prime example.
If you include the above quoted snippet of the song in a youtube video, the probability that it will receive a copyright claim is close to 100%. Fair use is a legal defense that a person can use in court, but the purpose of copyright filters and thus the purpose of Article 13 is to resolve the issue in favor of the author before it end up in court. Article 13 in practice eliminates fair use.
Article 13 do not require copyright filters to consider fair use. If it did we would likely see a very nuanced discussion since it would force youtube to change their system in order to be compliant, but alas thats not the case.
If HN implemented a copyright filter we should expect from experience that such filter would not consider fair use, nor would it enforce copyright on the basis of proportionality. We could claim that this result is not the fault of article 13, but that is a naive perspective.