Why does Quidditch allow faster brooms?

In the first Harry Potter book, Harry got Nimbus 2000 which was the fastest at the time. In the second book, Malfoy's father gave everyone in the Slytherin team Nimbus 2001.

A sports is a test of players, not their tools. Real World sports do allow players to bring their own tools, but there are fixed specification limiting that. Nobody's special tool can help a little bit in winning the game. For example, in Cricket history, once a batsman brought a wide bat covering entire pitch, so he couldn't be bowled. Seeing this loophole, a new rule was pushed to fix dimension of bat.

This brings one possibility about Quidditch: Maybe, a faster broom doesn't give a player advantage. But, I can turn down the possibility with various quotes from the book. Wherever better brooms are mentioned, you can see the owner (or his/her friends) boasting about advantages they would get in Quidditch. It is projected by the author, too. In the first book, McGonagall gave Harry Nimbus 2000 because it could be advantage to Gryffindor. In Mudblood and Murmurs chapter of the second book, when Slytherin team displayed their Nimbus 2001, all laugh at Gryfinndor team as if they had a big advantage in Quidditch now. Also, Gryfinndor team felt envy.

(Sorry for the regular language, but I don't have book at this time to give quote)

Why does Quidditch allow faster brooms which can give players advantage?