Right. Because there's no logical reason for someone to want to play a DPS, or have higher FPS, for any other reason than "They like big numbers." That's a very intelligent thing to say.
Maybe if I played with a DS4 controller on Legacy camera and have next to no camera movement, I'd say that you can't notice. All you really have to do is do mouse movement with 60, then do mouse movement with 120, and see the difference. If you can't notice that, then well, you're either blind or you're simply sitting on a 60hz monitor and you think more frames on that makes it anything but 60.