I took a 2010 Highlander to 250k miles with 10k oil changes and never changed the transmission fluid. It ran perfectly, shifted smooth as butter still. That being said it’s not going to hurt if you change it more often and do a normal change (not flush) of the transmission fluid after 80k miles. I don’t buy the “it’s all a conspiracy” stuff though. I will say there are far too many oil change shops that will lie about the oil they put in. I have caught several putting in conventional oil when I asked for full synthetic. Also if you are a low mileage driver then consider changing it more often at least every 6 months IMHO. For us we do 20k miles a year so that isn’t an issue for us.
I love EVs and I do think they will be the future BUT they need more time to develop the tech and infrastructure. I would love to see every new car being sold as a hybrid in the meantime as a stop gap measure while it develops.