You dont need a "real" pilot to understand that. It is quiete simple.
Even though different real aircrafts process the joystick inputs dependend on different values (it is not worth going into detail here, becuase question is "curves" ingame and believe me it would explode the topic), a ingame curve-option is mostly based on the fact allowing to balance different joystick inputs, basically a custom choice to counterbalance device properties etc etc.
If you wanted it realistic, the game would just recognize the joystick inputs from 0-100 linear (your pure movement) and process it according to the airframe characteristics, its input processing grid and pure flightphysics according flightsituation (like old Falcon, and it doesn´t matter in respect if fly-by-wire or not), but there is no sim in my knowing not failing in accomplishing this - i mean the PC sims.
In other words, NO, curves are just play-options, with the addition, that not one to me know sim (including this one) has not flaws, allowing to exploid your crafts performance (i gave it a shot, still the same problem like older sims have).....but this again, is another story, not worth being digged up in common interest me believes.
Valid question, but i would advise addressing this question directly to the makers of this (or other) sim.
cheers and happy x-mas