Just because something happened in one situation doesn't mean it'll happen again in a different situation. By your logic we'd all be using laptops with touchscreen keyboards now, but we aren't.
To belabour an obvious point: when you are driving a car it is vitally important that you keep your eyes on the road. When you are operating a mobile device, much less so. So hardware controls are far more useful in a car than they are on a phone. Touchscreen keyboards on phones are a trade-off - what you lose in tactile feedback, you make up on valuable screen real estate. That logic doesn't apply to cars either.
To belabour an obvious point: when you are driving a car it is vitally important that you keep your eyes on the road. When you are operating a mobile device, much less so. So hardware controls are far more useful in a car than they are on a phone. Touchscreen keyboards on phones are a trade-off - what you lose in tactile feedback, you make up on valuable screen real estate. That logic doesn't apply to cars either.