You'll never hear me helmet-shame a person on a bike, but I absolutely judge people who don't bother to put lights on their bike after dark. This isn't just because of cars, but for everyone's safety, no matter if it's pedestrians or others on bikes.
Random wish of the day: all bicycles should come pre-equipped with decent front and rear lights.
These should be upgradable/exchangeable by the cyclist.
Sincerely,
An emergency worker who consistently sees unlit bicyclists while driving home at 0400