Comment by cowfriend

Let's put it this way. The fear is someone hiding in the shadows to jump a person, and then dragging the victim back into the shadows.

Bright lights on the street create more shadows. All you have to do is step out of the streetlight and no-one will see you, because the light-level contrast between the lit street and the surrounding space.

If there aren't any streetlights, so the surrounding space has the same illumination as the roadway, then that space is more present in more passerby's visual awareness.

So your proposed solution, "Streelights on every street" actually increases the risk you are so concerned about.