I rarely think about these things from neuroscience perspectives anymore, but I'd imagine simply tuning into one's environment using conceptual representations like words and data can remove oneself from a state of flow, when what matters most is muscle memory, reflexes, strength - all physical stuff. Overloading the mind with information the body must calculate through the mind, that sounds to me like it would be sending an interrupt signal to a system that's already functioning correctly (or at peak performance, what have you)
The visual field is the most simplified representation of data one needs when the body is doing the rest of the work. You can't think your way into running faster, you can convince yourself that's what the mind is doing for something like, extreme distances, training (maintaining motivation to improve performance), but the goal at the end is training the literal muscle to respond efficiently, and training the mind to react to the environment precisely according to the set of rules laid out by the game.
Reasoning about it beyond the literal reality of the game, and the literal ability of the body, once both of those spaces have been trained to peak performance is inefficient, so I would imagine it would be easy to discard all of the thinking that got you to that point. It's like it transforms into a feeling of comfort and confidence instead, because I would assume you would become accustomed to all of that stuff working as expected, your own performance would become predictable and unwavering.