1. I should not have to authenticate or have connectivity to a manufacturer unless I want to once I've paid for a physical good(cars being physical goods).
2. I don't want my personal data to be sold off to anyone - I've been in the tech industry for long enough to know that "I don't want my data to be shared with third parties" is worth as much as the power used to light up the pixels on the screen.
3. I don't trust anyone to have done everything carefully and by the books to prevent any potential leaks.