> Almost invariably after submitting, I see how I could clarify and/or expand on my thoughts, so I often do end up editing.

One of the tricks of HN is the 'delay' setting. https://news.ycombinator.com/item?id=231024

> There's a new field in your profile called delay. It's the time delay in minutes between when you create a comment and when it becomes visible to other people. I added this so that when there are rss feeds for comments, users can, if they want, have some time to edit them before they go out in the feed. Many users edit comments after posting them, so it would be bad if the first draft always got shipped.

I've got mine set to 2. It gives me a little bit of time for the "oh no, I need to fix things" or "I didn't mean to say that" and when everyone else can see it.