Most are missing the point. You’re right, running AA or CP is akin to just using your phone with a vent mount, albeit arguably safer. The privacy issues come with things like OnStar and similar services that connect back to the manufacturer. As someone already pointed out it doesn’t sound like there’s a way to remove OnStar, but some others might be removeable, or not available in cheaper models.
Awhile back, I got a bookbub deal alert email about a series called the Lattice Trilogy. When I read the synopsis, I wasn’t sure I’d buy the premise: a future where privacy simply doesn’t exist. Still, out of curiosity and an extremely low price, I gave it a read. Wound up reading all three books. Since then, I’ve been watching privacy die in much less sci-fi-y circumstances.