IMO it's more likely to be that they know full well those bots are skewing the figures underpinning their valuation and their general popularity with investors. They're trying to quietly move the narrative away from that part by focusing on the naming issue.
You seem to forget that Zuckerberg owns majority voting stock.
He could turn Facebook into a porn site and there isn't anything anybody can do about it. So when you understand this you will see how ridiculous this notion is that Facebook is complicit in scamming advertisers.
Also do people not remember when this was (and still is) happening with Google ? It's like spam. You can manage it but never really get rid of it.