As a human with a driver's license, I'd say the job of driving a car demands ~1% of my mental system features.

Here's a few skills of my brain not needed for driving,

- compose poetry and alternate lyrics to "baby shark"

- recognize emotions on faces

- form opinions about music, movies, video games, etc.

- have a conversation

- remember that time I embarrassed myself in sixth grade

- contemplate my own existence

- divide other people into friend/enemy groups

- etc...