It's not always about that. AA and Car play are a very common reason for service visits and it's not uncommon for customers to get their entire head unit replaced because of frozen screens or whatever. GM hired a lead dev from CarPlay to help lead their replacement. When they work it's great but my touchscreen freezes regularly and it's extremely annoying.
So basically, automakers can't make a robust console to simply display the streamed content. What makes you think that their software will be any better?
