There are mediums (pun not intended) where you can make the equivalent of a blog post without much effort (Medium, Quora, I'm sure there are others). And link-bait is more about the marketing used to get people to click on the link (e.g. editorializing), isn't it?
I don't want to get into semantics, so let's consider this a minor detail, because the more important matter is that you're editorializing. HN has a pretty clear (and helpful) set of guidelines on posting:
http://ycombinator.com/newsguidelines.html
>If you want to add initial commentary on the link, write a blog post about it and submit that instead.
I'm not trying to harangue you or anything; you make a good point but it's hamstrung by a length-limited title section.