I map many trails on osm from personal site surveys and a combination of sat imagery and my gpx files. No way google is doing that because there is no one to steal the data from. It was me, the enthusiast that put it in osm directly. That’s just me and the trails I load tho. Example - Latest was short one at monkeyface falls. https://www.openstreetmap.org/#map=19/34.098058/-116.955639
I hike on trails in New Mexico, and I find the existing trail data on osmand/OSM to be astoundingly accurate. I had concluded that NSF/BLM must have data.
So few people hike these trails that I do not believe they were entered one by one. The one "trail" I hiked that was entered by someone I deleted later that day, because it should not have been shown as a trail.
