I don’t think anyone will disagree with you about unsupervised OTA updates.

To your first point- I agree that any update that changes the behavior of any system in a car is pretty reckless. Especially ones that increase a car’s acceleration. I don’t know why those sorts of updates aren’t being regulated harder. OTA updates should be for mundane things like infotainment updates or, in more serious cases, to fix systems that aren’t functioning properly. It shouldn’t otherwise be used to alter how the car functions as a car.

However, to your second point, cars are smart now and there’s no going back. So cars do need software updates to close attack vectors.