That's similar to what I tried to do, or rather what I thought I was doing for awhile. I'd consider HN a place for "early drafts" of blog posts, idea being that I'd stumble upon something thought-provoking here, be inspired to make a novel observation, and then use that as the seed for a full blog post.
In practice, I just kept writing more and more of these "early drafts" and didn't write any blog articles for nearly a year.
In practice, I just kept writing more and more of these "early drafts" and didn't write any blog articles...
-- Is this a net positive? Or Negativer?
Seems like it could go either way. HN inspiring you to write down an idea/develop it you otherwise would not have. And perhaps providing feedback/criticism (on a point-by-point-basis). Both of those are good things. OTOH, if the idea ends up only partly-developed, never fully, and you move forever on ("itch=scratched"), then perhaps it is worse, because in effect it keeps you from developing /any/ ideas fully. Did you write other blog posts (from other motivation)?
I'd suggest writing down all of your ideas in a separate file, along with the "early draft" HN comment, and then making it a point to dequeue them into full-blown blog posts on a regular basis.
Commenting is for engagement, rather than broadcasting, no matter how much lurkerbaiting you tell yourself you're doing.
In practice, I just kept writing more and more of these "early drafts" and didn't write any blog articles for nearly a year.