Some cars already do. My car has buttons on the steering wheel which allow you to navigate menus, control the radio, etc. As well as paddles to control over fun

Some cars already do. My car has buttons on the steering wheel which allow you to navigate menus, control the radio, etc. As well as paddles to control over functions. The problem is if you are not on a straight road those controls become virtually impossible to use safely. Whereas if I quickly need to change the volume or even mute the radio I can do so one handed without even glancing at the volume dial on the radio and still steer the car safely.