Why should the girls diet? There should be organizations to fatten up the boys! How dare you suggest that the girls should have to shoulder any burden for their single status! Is it even possible that a frum yid can have any considerations that outweigh the great burden the bnos yisroel carry? Just imagine how sad it is for the girls to spend all night on their phones, while the boys get to sit and learn. Send the boys to the dining room and let them stuff their bellies until they promise to stop learning.
That is the real way to attack a problem in our day.