Is Crouching tigers hidden dragon the only Wuxia stuff you know? How about those eunuch in the palace that know formidable Kung Fu and fly around. Not to mention the Shaolin Monks in Wuxia Flims.Especially the 18 bronzemen. Those characters in the Wuxia Novel "The Return Of the Condor Heros"...etc.

And also, Barret and Cid aren't that minor of a character like those random guards that appear beside the main characters.

Lastly, can you prove that Barret and Cid aren't trained in the CHI thingy while Tifa and the others are or this CHI thingy do apply in the movie or even the game itself.