Yes and no. It’s just that no one has bothered to make the page for one; you’re free to do so. Your accusation of deletion implies that there was a page that was deleted. That would be a bias, but it wasn’t the case. The page was a redirect that violated the rules.

In other words, there’s a bias in the editors to not make it, but there’s no malicious bias that deleting an actual article would imply.

But look a little closer…

Someone first moved it to userspace, causing it to become a redirect: https://en.wikipedia.org/w/index.php?title=Talk:List_of_left...

Which then triggered it’s deletion.

Ah. That is interesting. The reason for the deletion of the draft is supposedly inactivity. I can't see the contents of the page before deletion, so I can't comment on how complete the draft was, but it's definitely a page that should exist.