I have to disagree.
On a windy day, a dog can land 20 yards downwind and still come up with the blind. That's not challenging the blind. The line to the blind is from the line to the bird; a direct path. Any deviaton off that path is off line, and how badly "off line" this is considered is directly proportaional to the game you are playing and the stake you are running. It is not about just picking up the chickens; you must demonstrate control. The judges set the blind the way they set it, so that a team that challenges the blind will have to demonstrate control and perseverence over obstacles in their way. If you go around the obstacles, you get the bird, but demonstrate nothing as far as control, willingness to please (takes a good initial line even when the dog doesn't like the picture presented) and perseverence.
I once ran a WDQ event where the line to the blind was straight down a point, then across the channel. If one challenged the true line to the blind, one had many handles, because this particular pair of stooges said "The dogs must stay wet." Impossible to do, unless one kept the dogs' two left feet ion the water, and 2 right feet on land. THAT was the line. THAT was what I tried to do, but after ten whistles and we were STILL on the point, I picked up.
Several dogs passed. Their owners sent them on a line 90 degrees perpendicular to the true line to the blind, allowed the dogs to get out to sea, then gave a big right "OVER". One whistle, you did a great job, you got a ribbon.
Poor judging at its worst.
And yes, one of the stooges STILL gets asked to judge.