"6. An expert or enthusiast of any kind. One might be an astronomy hacker, for example."
http://catb.org/jargon/html/H/hacker.html
And the result of this hacker matches the second canonical definition of "hack":
"2. n. An incredibly good, and perhaps very time-consuming, piece of work that produces exactly what is needed."
http://catb.org/jargon/html/H/hack.html
The production of this dress was an appropriate application of ingenuity that resulted in a carefully crafted work of art, which is literally hacking:
"Hacking might be characterized as ‘an appropriate application of ingenuity’. Whether the result is a quick-and-dirty patchwork job or a carefully crafted work of art, you have to admire the cleverness that went into it."
http://catb.org/jargon/html/meaning-of-hack.html
It is interesting (to me at least) because it is something I have not seen before, done skillfully, and is not Yet Another Article About Rust or Containers (YAAARC).
HN isn't just about programming. It's about absorbing deep knowledge from a variety of sources, whether that's the field of pharmacology, industrial manufacturing, or what have you.
I'm not particularly interested in sewing, and don't wear dresses (well only on weekends ;) ). But its great that other people are interested in that.
Surely the best thing about the internet is stumbling across some blog about some niche interest you had never even considered before, and being enlightened by it. I much rather this than some web 2.0 social media platform with no vowels in the name.
I suppose you could make the argument that HN is for developers, and so should only contain developer things, I don't think the field would advance very rapidly if no one even brought in anything from outside the field. Just wait, next month some web 3.0 doohicky will be announced, informed by this very article.
Totally fascinating and worth reading. Or skipping over if it isn't your cup of tea.