It's a fair question, which was also raised when the iPod was introduced. It helps to see Apple as an "affordable luxury smart things" company. Dumb, ICE-based cars were a poor fit, but smart, mostly solid-state vehicles may not be.
Automotive is just another product category large enough to matter to Apple. A possibility not mentioned in the article is that Apple may initially partner, as they did with Motorola for the ROKR (but hopefully more successfully). Sony, the company Apple wanted to be when it grew up, is doing this with Honda for their first car, the Afeela.
> Tesla had the advantage of being the first mover in the EV market…
Apple has gone up against several first-movers that are now gone or are shadows of their former selves. It's neat that Tesla will be remembered as people's first EV, but it's not enough to ensure their market position 20 years from now. Tesla has no special sauce that I'm aware of.