Ultima-Griever
Sorceress
It is known for a fact that Jecht is a dream of the fayth, he's being summoned by Yu Yevon, therefore he has his own fayth which is one of those hundreds or even thousands of fayth dwelling at Mt. Gagazet. So, then, how could he himself, being a summoned creature, have become a fayth? He was not human. This is evidenced by the fact that, when the fayth awakens, Tidus starts disappearing, because his fayth departed to the Farplane. Fayth, however, are different from the regular Farplane souls: they have a mind and a will of their own, shown by the little kid who used to be Bahamut talking to Yuna, giving her advice on Shuyin and promising that they (the fayth) would do the best they could to bring Tidus back. Unless what became a fayth was Jecht's fayth? Then, how can a fayth go from one statue to another and shapeshift its dream?
Another question regards Yu Yevon and the fayth. Yu Yevon couldn't have created the fayth, because obviously there were events preceding his birth, or else how could have Zanarkand's technology been developed? And the summoners of that era inhabited Zanarkand, for the knowledge of creating fayth pertained to them. However, considering that summoners were on the road before Yu Yevon was born, how could all fayth have awaken?
Another question regards Yu Yevon and the fayth. Yu Yevon couldn't have created the fayth, because obviously there were events preceding his birth, or else how could have Zanarkand's technology been developed? And the summoners of that era inhabited Zanarkand, for the knowledge of creating fayth pertained to them. However, considering that summoners were on the road before Yu Yevon was born, how could all fayth have awaken?