Mazda and other automakers build TRULY AWFUL UIs in their cars. Carplay is a godsend in this case. You can direct Siri to send texts, read texts and you have a superior GPS application. CHeck out the abomination that it Mercedes-Benz carousel for showing/selecting radio stations on their cars.

What you are really advocating is tactile feedback for digital displays--with some method of shaped feedback on by the screen itself. As a touch screen's in cars don't offer haptic feedback, that is an issue. That said some aspects like moving up and down stations or songs in a playlist can be controlled by steering wheel paddles or buttons on the wheel.