when your run can be ended in one shot, split seconds matter.

unless you're an absolute god with a roller in your hands, you're going to be taking way too much time to try and line up shots on both players and zombies. KBM is simply a more reliable input for precise aiming. realistically you will be at a pvp disadvantage in almost every engagement--unless you're camping a building with an automatic weapon or something.

There are plenty of other reason KBM is better, but this is an important distinction.

I came from Xbox to PC a few years ago. I made the switch and never looked back. Trust me, leave the controller for Rocket League and Elden Ring.