What is the point of switching Flight Assist Off and in which instances and circumstances can its application be useful? With the Flight Assist Computer constantly countering your ship's flight path so your vector stays true and steady, is of course incredibly useful particularly during combat, so turning this off will at first sound like a silly thing to do and useful aid to switch off intentionally.

Flight assist helps stabilize your ship's maneuvers. With it activated, all you have to do to stop the ship from turning/rolling is let go of the commands, The flight computer will activate the thrusters in the appropriate way so it goes back to straight flight. There's a penalty in maneuverability, this can make it harder to keep an enemy ship in your aim reticle.