I suppose cyclists (sport and/or commuter) choose to not use lights for a combination of reasons:
* they are not there/charged when they go riding early morning and don't feel like fiddling
* they can see just fine, and don't care about being seen
* they just don't own them.
As a cyclist you can get irritated by these ghosts in the dark either because they are a hazard to you, or you are concerned for their safety (or both). The official stats from road accident deaths are sobering. ~43% of deaths are pedestrians.
2022 - 12436 deaths, of which 5347 where pedestrians. about 15 per day.
Many of these will be drunk pedestrians, walking into the road - we're not changing that habit in a hurry. but some will just be walking in the darkness and are impossible to see. If only black label gave away free beanies with reflective strips for every case sold these numbers might come down.
The simplest upgrade for cyclists which has no battery requirements is 3m reflective tape.
I use the white one, put it on chain stays, seatpost and even small bits on pedal as that moves.
