The only proper way to determine "fairness" is not by your designation, but by following the pre-established rules for consideration.
If she were sent to the Olympics without participating at Nationals, that would indeed be unfair, since she would be ineligible for consideration to be selected (Wakaba would be a different story, since she is a former world championship medalist, and would be eligible for consideration)
Is she wins Nationals, her selection would be fair. That's the single most important criteria!
If she doesn't win but medals at Nationals, her selection would still be fair. A podium finish at Nationals is also a big consideration.
If she shows up at Nationals, doesn't do anything but single jumps, and fails to qualify for the free, then her selection would...still be fair. Her world ranking, built up through years of competition, earns her a right to be considered. There may be quite a few people that don't like that, but by the rules, she has earned such consideration, so long as she fulfills her obligation to compete at Nationals.
So, as long as she steps on the ice and competes at Nationals, her selection would be fair, and I doubt that a single competitor would disagree with that.