EVs, are just as, if not more complex, as a modern ICE vehicle. Just different sensors and computers. You need battery management systems with hundreds of angry highly reactive cells, battery coolant systems, electric power steering, brakes, a/c, range management and calculation systems, some have autonomous driving systems, gps, 360 camera and radar systems, regenerative systems, on and on
EVs can be simple, but modern expectations and convenience make them a beast. Same with old cars, super simple but no modern conveniences.