Gaming mice have superior durability, ergonomics, and accuracy. Each [good quality] mouse is finely tuned in weight, button switches, scroll wheels, and shape. This ensures optimal performance for the user, especially ideal in a gaming environment where such benefits are needed in a highly competitive scene. Every advantage, no matter how small, will be taken - a similar prospect in traditional sports that esports borrows. Professional FPS players absolutely need that accuracy. If they miss, it should be at the fault of the player and not the equipment. Think about it; would you ball up in a pair of beat up Chuck's or would rather play in some nice, comfortably J's?