Besimudo, you are very good at comparisens between FF and other stories and movies (although you seem to get off topic a little...). Women are used for sexual appeal almost everywhere, so you shouldn't be surprised with that Squaresoft would make some of the characters' outlook appealing as well. People would obviously be interested in something if it had attractive main characters.

Although there are people who would want to get a game for their interest in it's gameplay or story.

Squaresoft want their games to be appealing not only in gameplay, but in the characters as well.