Gilligan kept them trapped on the island for his own amusement.
cognitivedissonance Actually, they got Tina Louise on the project by promising it would be called "Ginger's Island", and that Ginger would be the main character. She was bitter about that till her dying day, as it ruined her career as anything other than Ginger.
Desidiosus She had nothing to complain about. A generation of guys grew up rubbing one out to her and Mary Ann.