Earlier quoted context omitted.
Do companies ignore regulations? Sure, some do. But saying 'they will just pay the fines' ignores the fact that we could make the fines existential, or punish board members by kicking them out of the industry. The answer to 'the regulation we haven't even tried won't work if we do it improperly' is 'let's do it, and do it properly'. I have no idea what homomorphic encryption is, but rarely do 'let's add more tech to…
Homomophic encryption simply means that the data is encrypted in a way that the person working with it cannot use it arbitrarily. Here is an example, I would for instance use Google Maps for Navigation but Google or any other third party would have no idea where I am going. I used it in the first company I worked for and it works beautifully. A) and B) work but they are not as effective as homomophic encryption.
You don’t need homomorphic encryption for this, just local route processing. In the case of car data, the auto companies aren’t doing any useful processing of the data for the user. Homomorphic encryption is irrelevant.