I think part of the reason for so many remakes is because many of them are rather pure and innocent. Hollywood can't stand that. So they have to remake them into "modern" remakes where some of the characters are gay, f-bombs are hurled frequently and any portrayals of the nuclear family are shown with subtle ridicule.
Hollywood seeks to sully these classics for future generations so as to further their aims at social deterioration.
Reminds me of the Brady Bunch remake.