[quote=@CirusArvennicus]
Avatar doesn't use magic, it uses ancient martial arts, and users gain gain control over nearby resources. They bend the substance to their will.

Dragon Slayer Magic is [i]completely[/i] different, and has a rather... established sense of what it does.
[/quote]

Problem is even benders who have an established ability that most normal people do not have need to learn to transition water between it's various states at will. Sure there's a chance it can be done by accident as seen in episode 2, but overall they use bending which even though they are based on martial arts, hold mystical properties as shown in the origin of bending and Avatar Wan in Legend of Korra. Sorry if that's spoilers... But I'm trying to make a point... I sincerely do apologize...