Google maps is more than just a map. You can submit pictures of a restaurant to gmaps. Google knows that the business still exists and other people can validate the data. On osmand you don't even see how the restaurant looks like.
This kind of app https://github.com/Discostu36/OSM-Photos is needed for osm to succeed and become mainstream.
Imagine connecting activitypub to osm POIs. People/users would interact with the map.
Not even the dead are above the law