These are not “self driving” cars. They are dependent on using google or apple internet services.
Apple cars will on drive on roads built by apple with maps only from their iTunes store.
Apple doesn’t sell songs only made by them ... LOL ... and the movies I get aren’t made by Apple. I read newspapers that aren’t printed by Apple and I can surf to websites that aren’t made by Apple. My e-mails are restricted to go to only Apple employees or Apple.com addresses.
AND ... Apple doesn’t prevent my iPad or iPhone from getting apps from anyone but them ... :-) ...
I think someone has steered you down the wrong track.