It's interesting to consider how many details on our online maps might be there because of submissions from random people who may or may not be submitting official names or details. When you zoom in to see these minute details, there's no way that Google or Apple can fact check every suggested change, so they have to assume that most submissions are truthful in order to hopefully provide details down to the most local zoom level.
When MapMaker was still around, you could see a lot, but not all, of the history of a feature on Google Maps. A submission from an end user would have been visible clearly as such. Imports from third parties would have been less obvious (and definitely wouldn't have named the source).