We have no standardized tests in Ontario. You just pay for expensive sports, extracurricular competitions, or private schools that provide the two.

Realistically, it's much easier for a person of average means to study for a standardized test than it is to buy the transport necessary to an international math/science/business/water polo competition.

It's fundamentally impossible for a person to do well in ice hockey if they cannot afford the hundreds of dollars in skates and protective equipment needed to play the game. Taking a standardized test is usually free. Does money give an advantage in both scenarios? Yes, but at least it's not an absolute barrier in the second.