If I paid for it and it's in my possession, I own it and will do what I like with it including rooting the software. If that's not possible I won't buy it. In any case I'll always advocate to others not to give money to companies that behave in unethical, rent seeking ways that hobble your rights as a consumer.
> will do what I like with it including rooting the software
On a safety-critical, public-endangering, federally-protected vehicle? Good luck with that attitude.
Hobbling the battery with software has nothing to do with safety and definitely is not federally-protected.