Routing on to impassable 4x4 trails

When routing in from Thornton, CO to Camp Dick, Lyons, CO, ABRP will avoid Hwy 72 and instead try to route on 4×4 trails. These are off road trails that are nearly impassable. This could be dangerous for someone less familiar with the area and it doesn’t even make sense as the major road is passable parallel to these roads.

https://abetterrouteplanner.com/?plan_uuid=2-69b6098a-ca7d222f2c6d64a8508e8491