It's well known you need something to do in order to keep your brain occupied and your attention levels up. This is why the worlds longest bridges are sometimes curved, as driving straight remove the need to be steering, and can make people sleepy. If I wanted everything to be done for me, I'd take the train. If I'm driving, I like twiddling all the different knobs, changing gear by myself, rev matching, turning indicators off at the right time, adjusting my wiper speed as the rain varies, switching from blowers to open windows depending on my speed, etc. It's all part of what driving is about, IMO.