Why do people feel the need to play a champ in ranked they have never played before

Seriously. What is wrong with playing norms? I don't get it. You can say, "itz jus a gayme noob" all you want. But the fact is that some people play to win the game. They play ranked. So if you're going to be a total troll, at least be intelligent enough to play norms. Sick of this Annie jg and first time Riven top feeding shit.