Instead of trusting or not trusting any map by default, try understanding how they're made, then you'll have a good idea what could go wrong with it.
OSM in particular doesn't use third party registries and surveys due to the licensing issues, relying on volunteer work instead, and has a participation-based culture (aka "if you want to have a map of something, make it yourself"). Armchair mappers are using satellite photos and publicly available info, while field volunteers map everything that cannot be seen from above. Both are important. Obviously your trails have to be visited by someone participating in the community for them to appear or be updated on the map. You could be the one, for example.
OSM is also highly chaotic like Wikipedia, and the quality heavily depends on the local community, so always research the situation in the area you intend to visit. For example there's a lot of unreliable poor quality machine work in Latin America in OSM, even in populated areas. No idea why Portuguese/Spanish-speaking communities are letting this fly.
I agree with what you’re saying. I just find myself lulled by OSM’s ridiculously high quality in the places I usually go. And I suspect many others feel the same.
OSM in particular doesn't use third party registries and surveys due to the licensing issues, relying on volunteer work instead, and has a participation-based culture (aka "if you want to have a map of something, make it yourself"). Armchair mappers are using satellite photos and publicly available info, while field volunteers map everything that cannot be seen from above. Both are important. Obviously your trails have to be visited by someone participating in the community for them to appear or be updated on the map. You could be the one, for example.
OSM is also highly chaotic like Wikipedia, and the quality heavily depends on the local community, so always research the situation in the area you intend to visit. For example there's a lot of unreliable poor quality machine work in Latin America in OSM, even in populated areas. No idea why Portuguese/Spanish-speaking communities are letting this fly.