No route mapping system can be perfect. On the one hand, someone will complain about a barely passable segment. However, someone else will be annoyed that a "shortcut" wasn't shown.

This is no different than with paper maps, or even local info. When route planning, you have to draw on multiple sources, and cobble together a plan that suits you.

I suppose that over time google, and other mapping programs will accumulate more data, and provide more details about roads, such as type of pavement (or lack), condition, shoulders, etc. but no matter how good it gets we still have to accept that one person's great little shortcut is someone else's miserable stretch of bushwhack.