Not a fair match
It would be quite unfair if one team would have an advantage over another, right? If this girl really was a giant, I wouldn’t want to be the one playing (or rooting) for the other team, because they are in for a disappointment. Luckily for them, this girl isn’t a giant, but it’s just a matter of perception. The photographer happened to catch her close to the lens, making her seem disproportionately big.
Everyone else in the court is looking up to her since she’d just thrown the ball, which emphasizes the illusion that she’s bigger than everyone else in the room. That being said, it could also make the game more interesting if one team had this kind of advantage, don’t you think? It would be unfair, but also pretty cool.