People
He loved the wheel of a car as he loved his desk in the office of the Banner: both gave him the same sense of a dangerous monster let loose under the expert direction of his fingers.
— Ayn Rand ‧ The Fountainhead

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Two very different things get linked by the same feeling here. Driving and working at a desk both supposedly give him a sense of controlling something powerful and dangerous. Mastery over that risk, not the activity itself, seems to be the real draw.
Context reviewed