HN hopes to foster deep insightful discussion, not a quick TLDR format summary so you can click and move on.
Noted!
I specifically look for the quick TLDR in the thread since the titles are frequently so non-descriptive of the linked content.
In my case the /submit form threw me off, haven't used it much and the "text is optional if url is present part" didn't really register. I've probably been conditioned to modern UI which really guides you along i.e. I thought "text" was a required field