Deadzone on controller joystick is built in the game

Why is there a built in dead zone on the controller joystick? In bf1 and bf5, setting the deadzone to 0% is actual 0%. But in Bf6, 0% is more like 5%.

This makes target tracking much harder, because the velocity of the sensitivity start at 0%, but you don’t get input before 5%. It’s like pressing the gas pedal in a car, but nothing happens until the pedal is halfway down. Suddenly you only have the top half of the pedal — 50% to 100% — to control the car’s speed, which makes fine adjustments jerky and the ride very bumpy.

I have 27,7% accuracy with the Ross MkIII Marksman on bf1/ps5 (Check my tracker Usten1). This will never be possible with the built in deadzone.  

would be nice to get some answers from developers. 

thanks