In my opinion, if you're not doing anything wrong then you don't have to worry. If someone wants to follow me around and see where I go and what I do, so what? Again, my opinion.
Oh, it's the principal of the thing, right? So what.
Forget about the car keeping tabs on you, it's your cell phone that you need to worry about.
YOU may need to worry that is, I don't.
Of course, you're entitled to your opinion and we can disagree and be civil and I don´t want to get into an ongoing debate about this.
But let me point put that the right and desire for privacy is not about hiding wrongdoing and that, in fact, it has generally been considered wrong to track and surveill people without significant cause and legal process in a free country.
Also, let me point out that surveillance is often a precedent for control. And that it is not just the surveilled who might "do something wrong", but the surveillers who often engage in wrongdoing, simply because "absolute power corrupts absolutely" as Lord Acton said. And being able to track so many people at once in real time, while it might not be absolute power, is a heck of a lot of power and the temptation to misuse it is great and the odds that it will never or seldom be misused is quite minuscule.
So yes, the principle is important, but this is not just about the principle, its about the practice. You are free not to worry about it, but it is hardly a trivial matter.
As far as the phone, I do agree with you- The phone tracking is concerning and should be addressed. But one wrong turn does not deserve another. I'd rather not be tracked at all. But I'd rather be tracked less than more. And if the car tracking truly didn´t matter, they wouldn´t have bothered to spend money designing the hardware and software and building it into the car. So obviously they do get some additional tracking out of the connected car "services" than they do from just your cellular phone, otherwise why spend those resources?
You're free to ignore the issue all you want, but that doesn´t mean its not an important issue for individuals and society at large. And at the end of the day Mazda needs to give its car owners at the very least a physical disconnect OPTION of whether to drink this poison or not, not just a setting that can be remotely reactivated at any time by Mazda or others.