I wasn't making the point that one rides a sidecar differently than a two-wheeled motorcycle. My point was that one doesn't effectively steer a two-wheeled motorcycle by leaning. Rather, a two-wheeled motorcycle is steered by "pulling and pushing" on the handlebars, as part of the counter-steering process.

The author of the New York Times article seems to think people steer motorcycles by leaning. Motorcycles turn by leaning. They are steered through counter-steering.