Have you compared Google's and OSM's maps of those locations side by side? I wager OSM has much more detail. This is the case even for public parks located in the middle of major American west coast cities (where I would expect Google to have good coverage, if they had it anywhere.)
Consider for instance this city park in Seattle:
https://www.google.com/maps/@47.6397466,-122.2948284,18.95z
https://www.openstreetmap.org/#map=19/47.63987/-122.29488&la...
Google has gotten better in recent years, it now has a few of the walking trails, but compared to OSM it's still absolutely pitiful. Even in high profile locations like Yellowstone National Park, Google Maps is pitiful compared to OSM:
https://www.google.com/maps/@44.3925569,-110.5541906,18z
https://www.openstreetmap.org/#map=18/44.39273/-110.55472&la...
Re:Apple News No Longer Supports RSS
by askbjoernhansen on Saturday December 28, 2019 @03:23AM
(#21897822)
Apple Maps seems to have comparable detail to OSM for that location ... https://maps.apple.com/?ll=44.39273,-110.55472&spn=0.003043,...
Or what do you see that the rest of us don't? :-)
That may seem to be true some places, but I've seen many places (including around my house) where Google has great coverage of nameless walking and biking trails that aren't open to cars.