I have a straight, tough answer: Bcz they are SHALLOW.
Lack of depth of character makes you so dumb that u no longer know right from wrong, good from bad, foe from friend.
Pursuing something higher than just ur physical appearance & social status, adding spirituality is the answer
The ques I answered was WHY do Hindu girls not see how they are being trapped & fall for such machinations? Why do they fall prey?
The ans is for those who asked.
Pls read well & understand before commenting.