I asked that exact question to the pro shop manager at CCR . He explained it as it comes down to the shooter. Is the shooter capable of making an ethical shoot at over say 50-75 yards? The single adjustable sight pen is great if you can see long distances of a shooting lane and capable of making the longer shoots. If you can only see down the shooting lanes 50 yards and that is your max shooting distance , you will be handicapping yourself by having to adjust your sight at the shorter distance. Also leaving to chance to forget to adjust the yards and shoot high or low of the target.
I was looking at buying a high dollar sight and he talked me out of it for the time being . Until I was capable of utilizing it, don't need it.
magspa that seem like a large drop over 10 yards.