If we're being fair, the deletion log mentions the exact reason: it wasn't an article that was deleted; it was a (cross-namespace) redirect. The actual article could've been some user's sandbox page or something. If a page is a sandbox (not complete), there shouldn't be redirects to it. When the page is complete enough, then it can be moved to the main namespace.
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.
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.