And entertainment content generates an ROI. Apple Car does not. Though, I suppose Apple Car might be viewed as part of their Carplay strategy.
Carplay doesn't directly bring in any money either. ( 'freely' licensed although automakers have to do some development work for integration. )
The Carplay 'strategy' is to keep people using their phones for longer period of time so can be tracked and monetized better.
Making a whole car and building a Human-Compter interface for a car infotainment subsystem are two different things. One Apple is competing with their partners and the more a partner ship play. Apple tends to want to be the holistic system integrator. That leans them to start thinking about making the whole thing. But it is really is pretty far outside of their wheelhouse of talent. There is enough of an overlap ( and plenty of folks doing cult like valuations of totally automonous electric car vaporware ) that Apple can't stop dipping their toe/leg in the water.
In terms of the car it is a big money pit because more than several competitors are already moving with popular product. Apple isn't close to shipping anything and "no qualification corner cutting" class 5 autonomous cars is largely still snake oil sales. Cars that help people drive better? already being done.
As someone pointed out if Apple abandon their entertainment thing at some point they could just sell the library of content and walk away. The 'whole car' thing would likely just be a big hole in the ground that no one would buy ( apple want to sell IP . Big tech company tend to just bury IP they end up not using. ).
I have not heard what the compelling use case for the VR headset is. So I think this has been an even bigger distraction and money pit.
Only it really isn't primarily a VR headset. If it is a headset that could help people do work in the real world there are lots of use cases. Part of the ' compelling use case' problem is folks keep trying to cast it in the light of how it can be an even bigger escapist consumption crack-candy than the iphone. And the $8K Mac Pro isn't going to be a compelling use case for the entry Mac Mini user base. Apple isn't likely aiming at 'what would the rabid Apple fans buy' use case with this initial headset. Can more so start with questions with 'what is very hard/difficult to install , dianose , fix' followed with what kind of information can be made available without being distracting to make that process easier. So in the middle of surgery could you give a doctor better information to that don't cut the wrong thing. Probably. Assisting folks in doing their jobs better and improving productivity is a relatively broad and compelling use case. It is a tool , pick it up , do a task well/better , and more on. Just has to be more useful than popular.
An advanced headset would likely benefit from custom silicon designed to do advanced camera analysis. Gee Apple has done what with cameras and highly customer silicon with the iPhone over last 10 years? So lots of overlaps. Advanced screens needed ... again overlap in an area have had some success.
Thinner and lighter ? An issue headsets vendors really haven't mastered yet.
Apple making a > $100K car that only a fraction of the 1% can afford so they can be solely robot chauffeured around in bling bling style isn't compelling. More so a "got more money than common sense' money pit.