When not stored in its included dock, the Nintendo Switch is incredibly thin. This makes it lightweight and portable, but means that any impact has a higher chance of damaging it. Leaving it without a case exposes the Switch to that sort of impact damage, and also makes the screen vulnerable to scratches and dust. Buying a Nintendo Switch case gives you a safe place to store it when it's not in use. It also makes the Switch and your games even easier to transport without the risk of damage.