Most people don’t want the bot to be there, because they don’t agree with its opinion about what is “biased.” It claims factually solid sources are non-factual if they don’t agree with the author’s biases, and it overlooks significant editing of the truth in sources that agree with the author’s biases.
In addition, one level up the meta, opposition to the bot has become a fashionable way to rebel against the moderation, which is always a crowd pleaser. The fact that the politics moderators keep condescendingly explaining that they’re just looking out for the best interests of the community, and the bot is obviously a good thing and the majority of the community that doesn’t want it is getting their pretty little heads confused about things, instigates a lot of people to smash the downvote button reflexively whenever they see its posts.
It all just suddenly clicked into place for me.
I think there’s a strong possibility that you’re right. It would explain all the tortured explanations for why the bot is necessary, coupled with the absolute determination to keep it regardless of how much negative feedback it’s getting. Looking at it as a little ad included in every comments section makes the whole thing make sense in a way that, taken at face value, it doesn’t.