I just finished Tulin's storyline and excuse me while I bawl about this game further cementing the fact that Revali made himself a Champion. He was no descendant of an ancient Sage nor did he have a loving family to train him (that we know of). There was no power destined to be his: he crafted his own version of wind control without any support or spiritual guidance and excelled at it and then he and the other Champions went into battle without the special helms, without a sacred tear/charm to further enhance his abilities, without the certainty of two rulers (and a sage from the future) with god-like powers that could back them up if things went awry. Because of this, the original Sages survived where the Champions did not.

Revali was doomed from the start and if he'd known he would've still honed his craft and piloted Medoh with his beak held high and I am in shambles about it