I don't trust reddit reporting that value accurately. Not saying it is a huge percentage, but they likely doing some things to minimize the numerator and maximize the denominator.
But yeah, definitely about control. They could have monetized users on third party apps with more reasonable API pricing. People would probably have barely noticed and that'd be new revenue for reddit that didn't exist before.
It's not a small part of consumer vehicles in the USA anymore.
Don't have to ban gas trucks but there shouldn't be special breaks that incentivezes car companies to push them on people.
Battery mining and shipping should definitely be accounted for. But oil also requires extraction and transportation.