This announcement means Apple knows that neither public opinion nor the law is on their side and they're about to lose really, really big. And they're hoping if they can flip this around a bit and get control of the narrative, they can convince regulators they will self-regulate... while continuing to get a third of the revenue from all the most lucrative developers.
Google's new Gmail privacy settings fall in the same boat: They'd rather lose data from a small portion of their users if it might deter the government from taking away all of it.