Yochi:
If you are correct then there should be no Shidduch Crisis among frum boys, only by frum girls. Yet, there are a relatively large pool of older single boy. All of them should have been able to get married long ago, due to the tons of older single girls.
By the way, the idea of dropping Cherem Rabbeinu Gershom is a viable option if the Gedolei Rabbonim agree it is a good idea.