To me, these bikes with high trail numbers make more sense when you can fit these big tires, since they give you the traction to run over more things.
IMHO, a 45mm tire isn't big enough to make-up for the fact that I can't reliably steer around obstacles. Maybe I'm just overly sensitive to trail figures.
Love the variety of "gravel" bikes out there though. What are the typical riding use cases for a Fargo or Cutthroat? How much are you losing (if any) on pavement vs. a more standard gravel bike?