Because we have the original dragon riders, that's why!
Garabonciás are wizards in Hungarian folklore who learn their magic in a school (rings a bell yet?). 13 of them study together, and when their schoolyears are over, they all have to sit on the Wheel of Fortune, and the first one who falls down dies - the other twelve receive magic. Some say it is because they learn their magic from the Devil, and a life is the price they have to pay.
Garabonciás carry their magic in their books (they say this comes from the Middle Ages when any stranger who happened to walk into the village and was carrying books with strange signs in them - traveling students returning from abroad - was supposed to have great knowledge). They constantly travel from village to village; they can bring good or bad luck according to how people treat them. They usually drink milk. Just sayin'.
Garabonciás have powerful magic. They can fly, appear and disappear, bring luck, hunt witches, break curses, see buried treasure, make trees grow to the sky; but what they are most famous for is summoning storms and riding dragons. They can tame dragons that live in the lakes and rivers, saddle them, and fly on their back across the sky, hidden in stormclouds. There are hundreds of tales and legends about them; people used to believe in their existence until quite recently.
Nothing says badass like a tame dragon and a book full of magic.