I guess the question is "is it Twitter's goal to have the appeals process work, or just exist?" If they have some dumb automation that just rejects most initial attempts, it could discourage their users to the point where they can employ a much smaller staff to handle the appeals. Especially if the sanction can be solved by the user just deleting the content.
I'll admit that my initial comment was somewhat biased coming from another thread in this discussion discussing verbal abuse of the moderation team. In that context, my assumption was that they were human, naturally. Your point is fair, though, especially considering Twitter's scale.