Apple wants to be the operating system for all cars/hardware (ala Microsoft Windows) and Tesla is trying to be the Apple of cars (integrated hardware+software).
Not a perfect comparison but if Apple dominates the entire industry, there will be space for a premium alternative (even if it's not Tesla).
https://www.cnbc.com/2021/05/29/apple-carplay-massive-succes...
You just hand waved the single biggest reason people want CarPlay. I will not buy a car without CarPlay because of Maps.
Siri is also miles better than most in car voice systems including integrated Alexa.
Things like ETA are shown in super tiny, low contrast font and lane guidance only shows up ~30s before you need to take your exit.
‘Besides search, why would anyone use Google?’
You can’t remove the headliner from a show and ask why people still come.
I don't really care though since I can barely hear them over my cassette tapes blaring through my sound-system and the wind blowing through my manual windows.
[1] - https://childof69.co.uk/ha-car-telemetry/ [2] - https://www.autopi.io/blog/build-a-raspberry-pi-touch-screen...
Additionally, half of this country uses Android, which does not work with CarPlay, and doesn't work with the newly announced CarPlay OS. Automakers aren't going to shut themselves off from half of their potential buyers for Apple's benefit.