Love marriages are more desirable and attractive to people than arranged marriages simply because everyone wants to be loved for just who he / she is.  This craving is very basic and hence so appealing.  While Arranged Marriages involve a certain amount of cold calculations,  Love Marriages  involve Heart Felt Impulses And Feelings.
This is yet another example of how we struggle to rule our life with our Heads but almost always succumb to Heart felt desires.