Another factor that can’t be ignored is that under the current situation where there is a surplus of girls, many “less desirable” boys are getting married because they have a numerical advantage. If you level the playing field, you just might cancel out the girls getting married with the number of boys who will now find themselves “unmarriable” and end up with no net gain.
My point in these comments is that a single-minded quest for a solution that ignores the myriad consequences may open a Pandora’s Box that is even worse then our current problematic situation.