Street lighting is useful though! My partner wanted to go running but when it gets dark early it would be after dark, and there wasn't a good map of which roads are lit. I since filled in the data and OsmAnd can display it (map settings -> details -> street lighting), but it took a while to get stuff filled in and my partner has since stopped running x). It may help other people plan such trips, or tell people where they can feel more safe while walking after nightfall.

The data is virtually nonexistent in most places, at least until StreetComplete started asking for it, but I imagine that many will find it a useful addition if it starts being rendered or used in route calculations now that it's available here and there. (Which then leads to more people seeing the use and contributing that data, which again makes it more useful.) Finding your way in an unfamiliar place in pitch blackness is a lot harder regardless of safety.