I don't use this with my Tesla but you can setup our calendar and it will have directions waiting for you based on your calendar entries. I generally just push the address to where I am going to be heading from my iPhone before I head out.
You don't trust a car company but are ok with Apple using all your data? Apple may not sell your data to others but you know they are using your data, all your data right down to your heart rate and how you sleep to get you to buy more and more and more.
A few things: if a car manufacturer provides access to CarPlay (or, I assume same holds for Android Auto), then I don't have to "setup" anything. And, more importantly, I don't have to upload anything to the car (or car manufacturer's servers). And, when I rent a car with CarPlay - everything is still available. And, again, I don't have to upload my data into some unknown car!
I'm amazed you don't understand the simple concept of "the more places you put your data, the more likely it is that you'll lose it". I've made my peace with entrusting *one* company with my data - Apple. Their business model doesn't rely on harvesting my personal information and, more importantly, they've stated publicly that they don't use my personal information. If they did and people found out, they'd be sued out of existence.
What you say about Apple "using my data" is complete drivel. Of course they collect all this information - because I want them to provide services based on that information! What they don't do is use this information for their economic benefit. And when they do want to use your information off-device - e.g. to help with heart research - you have to give permission *and* the data gets anonymized.
I know you'll give a glib answer about me being naive. But what you won't do is argue seriously - like why I am wrong that they won't use my data because they'd get sued out of existence if they did.
But in the end, you do what you're happy with. If you want to give your data to every tom, dick, and harry that asks for it, instead of limiting it to one or two places you trust - go for it.