It comes down to something called aim assist. If a keyboard is better for controlling your button inputs and a mouse is better for aiming, why do so many pro players stick to controller? And more importantly, how do controller players still manage to compete amongst the best in their leagues? How Do Controller Pro Players Still Play So Well? In simple terms, a mouse has infinitely more freedom of movement over a controller joystick. On a controller, you are forced to readjust your angle or push in a direction to move your aim.
You can freely move the counter anywhere on a 2D plane without any restrictions. Every time you move when using a mouse, aiming is more akin to pushing your finger down on that counter and moving it, without the pin there.
