Those help but they are definitely not required. CS is fundamentally a game about first aiming skill (which you have to train) and reflexes, and then with skill

Those help but they are definitely not required. CS is fundamentally a game about first aiming skill (which you have to train) and reflexes, and then with skill becomes a game about strategy and map knowledge. Obviously at the highest levels you're not getting very far on a $5 mouse and a 60FPS monitor but you can get about halfway up up the ranks before it starts being a problem.