The HN title should match the original title of the article, unless the original title is misleading or linkbait.
We're specifically trying to avoid the Reddit-esque practice of writing a title to draw attention to something specific in the original article or make a claim about it. That's not fair to the authors/publishers of the original article, or to the audience.
If you want to draw attention to something in the article, you can do so in a comment in the HN thread.