Wired keyboards and mice are better, especially for gamers, and wired latency is low.
The wired mouse and keyboard have strong anti-interference ability, especially the mouse is more stable to use. And the wired mouse and keyboard do not need batteries, and the wireless mouse and keyboard need to be powered by batteries, so the size of the battery consumption of the wireless mouse and keyboard can affect the cost of use. Some wireless mice have a large power consumption, and the battery needs to be replaced frequently, which increases the cost of later use.
And wireless keyboards and mice need receivers, if the receiver is lost, the keyboard and mouse will no longer work. Sure, you can go online and buy a receiver of the same make and model, but a wired keyboard and mouse don't have that problem.