But it's not just for their own purposes. They shared it with the public which means they will get feedback, good and bad. No one forced them to post to HN.
In this case, someone shipped something that works for their use case, which is a great deal more than talking.
There's lots of approaches out there that say if you don't ship something embarrassing, it's too late.
I think this is the main point I was trying to make and our exchange helped me bring it forward, thanks.