You mean why isn't this forum thread linked in the mydeathspace article page?
The articles can only be created by a mod whereas forum threads can be created by any member (though I think there's a min post count first).
& forum threads aren't immediately created with the articles - they come later if a member has an interest in discussing it. There are a lot of years-old articles that have no forum thread at all. I'm not even sure if mods can edit the forum threads into the article later? I guess it could just get posted in the FB comments beneath the articles though? Feel free to do that anytime you like :)