Some people are more aggressive (read as "ham-fisted") when moving their controllers rather than being smooth and easy (gentle).... Those that are aggressive, use stick scaling to overcome the yanking/jerkiness of control input..
I, personally, never used it because I prefer 1:1 ratio (all sliders 100% across the top), and find that I can get more control input with less movement of the controllers, which also lends to having my controllers to last me 20+/- years of use, while others have the exact same controllers wear out / break in 3 years or less...
YMMV
Hope this helps
TC