Shinkirou's point was that just because one is a say water element ninja. That doesn't mean they can only use water jutsu. And Sasuke was able to learn chidori, before he knew his element, (do we know it now?) and I assume Kakashi's element is lightning.
Okay, so basically everyone has the ability to do jutsu in other elements (like kakashi doing suiton jutsu), however; it would appear that to create jutsu or have a makeshift jutsu, it is only done with your own element, or that it is extremely fucking hard to do it, using a different one.