OpenStreetMap policy is clear on this. Please refer to this wiki page.

https://wiki.openstreetmap.org/wiki/Why_can%27t_I_delete_this_trail%3F

OpenStreetMap is used by emergency services like BC Wildfire Service, Search & Rescue Associations, BC Ambulance, and BC RCMP to name a few. Having all roads and trails, including private ones, is critical to those emergency services.