Exactly
Though supposedly Aerith was a mistake, but in regards to the others, Cait Sith and Tidus especially, this is exactly my train of thought. And the dumbest part was the fact that you could name Tidus. What was the point? He's not an avatar. He has a personality already set. Why not use his name in the game, the characters could have said it, and everything would have been fine, rather than surprising us with a new pronunciation years after the release when it's mentioned in another game