Why is there a need for an Adjustable Drag Link?

[BRENT in 10-uh-C]

I fielded a phone call from someone asking about needing an adjustable drag link. I gave him my opinion that an adjustable drag link was a bandaid for a different problem that should be addressed, but I don't think he agreed with me. I explained that the only reason why the steering wheel would be off-set would be either a bent Drag Link, a bent Steering Arm, or the Drag Link internals (Spring, Ball Seat, etc.) is made/installed incorrectly causing the ball-to-ball distance to be off just enough. So to satisfy my curiosity since I may be overlooking else related to the Steering Shaft, Sector or Worm, is there anything else someone else has experienced that has caused a mis-aligned steering wheel??