It's built into the language of articles about crashes too. You'll see 'it is not known if the rider was wearing a helmet'[1] without any similar remarks about the driver of the car. Or the oxymoronic 'police are still investigating the accident'[2].
[1] I wrote this, then searched to find an example. Here: https://www.mlive.com/news/saginaw/2018/05/vehicle_crashes_i...
[2] As above. No action being taken, yet they know it's an accident. Written 2 hours ago. https://www.derbytelegraph.co.uk/burton/burton-bridge-crash-...