If the goal is just helping people, why would OpenStreetMaps be preferred over Google Maps?
I love answering questions on Maps and providing information for others (in my eyes: effectively working for them, not Google). Google Maps seems like it has a significantly larger user base, so my contributions help significantly more people.
It's very much a help-and-be-helped community, too. I can ask questions about businesses and have answers from other people in just a couple minutes. I don't imagine I'd have the same quality/speed asking questions on OSM (if they even have that feature?).