Running, just like any other sport requires training you cannot compete against people doing it seriously.
Last night I was looking at the "expected" times for a ten year old running 60. Her time of 9.3 was a bit faster than the lowest times. But a bit above the expected times of someone training for it. I guess with some training she could lower her time considering, as even with my limited knowledge I can see her form is bad :D
But kids don't know that it takes time to develop as a runner, just like it takes time and effort to be come a great piano player :)
And perhaps it is better for most not to realise and instead just have fun.