Pickups are #1, #2, #3 selling in the US [1]. There is room for both Tesla and Rivian. Just make them!
I bet the valuations of companies selling horseshoe, saddle, horses, stables, stagecoach, etc was high when Ford started out. Most people at that time may not have understood why Ford is valued so high when good money can be made selling saddles.
Technology evolves. Ford and GM are now the companies making horseshoes and saddles. This is reflected in the insane valuations of pure EV companies. Rooting for both Tesla and Rivian to be successful!
[1] https://www.caranddriver.com/news/g36005989/best-selling-car...