Right. But in wilderness with the absence of habitation (villages or hamlets), other destinations such as gas plants, oil wells, significant trailheads, etc. can be considered roughly equivalent.
An FSR (a British Columbia thing) is a major forest-access road, colloquially a “logging road” but also access for remote lodges, camping, hunting, fishing, etc. A road with many destinations (unclassified branches), many uses, often a large area being accessed. For this description, tertiary seems appropriate.
But “logging roads”, meaning those that simply give access to a cutblock or series of cutblocks, I agree, unclassified seems logical and that’s how I’ve generally tagged them.
There’s a place for tertiary in the wilderness; a medium thickness branch on the tree that is the road network. The wiki needs to acknowledge that. There are places without settlements.