Why wouldn't Canada want a talented, young athlete as one of its citizens?

Canada has offered citizenship to exceptional athletes in the past, but appears to have drawn a line when it comes to Erin Brooks.

Why wouldn't Canada want a talented, young athlete as one of its citizens?
A female surfer smiles with a board tucked up her right arm.

Canada has offered citizenship to exceptional athletes in the past, but appears to have drawn a line when it comes to Erin Brooks.