"How can money be the root of all evil, when shopping is the cure for all sadness..." Elizabeth Taylor
Most of the horses in horse racing don't win the big stakes by much more than a nose.
Sprinters win by fractions of seconds. The same with swimmers. Cyclists win by a hair's breadth. Many football games are won by only one goal - just a flick or a kick or a nudge of the ball a couple of degrees either way will make the difference between the championship and losing.
You see, you don't have to be brilliant. Just give life a good shot and it will make a huge difference because so many others don't give a damn. You will stand out in a crowd because for most people being average is an effort but being a bit above average is not an impossible task....