Many years ago, horsemen invented blinders to keep their horses focused on their work. Blinders are pieces of leather attached to the horse’s bridle that prevent them from seeing anything except what’s in front of them.
Without blinders, a horse can see almost completely behind itself without turning it’s head and can be easily spooked by movement or objects it doesn’t recognize. By having fewer distractions the horse is more dependable and stays focused on getting the job done.
As a trader, I always discovered that whenever I started comparing my trading performance with other traders, my performance would usually worsen. This “distraction” cost me lots of money in terms of losses.