Buying a car and then learning I have to spend more money for a particular feature already built into the car is not a satisfactory experience.
Sure, but this seems like an unfair criticism for something that is currently under development still. It's not like they are asking you to pay a subscription for heated seats, which are there and don't need any updates or maintenance. But self driving is something currently under active development and will always need updates. So a subscription there makes sense, unless you are expecting to get no updates on it.
main gripes I and others
Speak for yourself for, as I pointed out, all of the gripes here don't reference privacy or subscriptions at all. And I like how having the option of getting a subscription is a drawback for you.