You don’t have to trust the security checks, but they had to submit their personal information and documents to Uber, and would be easy to find if they did anything. And have two devices actively recording their location. That’s much better than an anonymous stranger, and I doubt a predator would go through all that instead of just, you know, remaining an anonymous person on the street.
Says “up to”. It will probably come with 2TB, but they are happy to put in more if you want to pay for extra. But 40TB is when they start to refuse your unreasonable requests.