I'm not following the implication/purpose of this post.

I don't get it? Isn't this how "tl;dr" posts work?

I've read it, I've found it a waste of time, so I gave a warning/summary so people coming after me know what to expect?

Am I doing it wrong?

It was a short enough post that it didn't really warrant a tl;dr.

Also, sadly these days many people assume such summaries are written by an LLM, and HN users seem to really dislike them.