Who makes this decision? Does some random soul just end up being the first one to use the switchbacks and then later reports, yes, I was able to make it?

From http://www.whitneyzone.com/wz/ubbthreads.php/topics/4904/4, Climber Joe made an observation that the chute is getting worn down fairly quickly. Has there been a time where the chute is no longer passable but the switchbacks are not passable yet?