Squeak, what it explains, more than anything else, is why a certain type of girl might be left over.
I am not retracting my assertion that there are more girls in the parsha than boys; the demographic equation which I presented (and you haven’t really refuted) is still true.
That doesn’t negate possibility, which I agree to, that there are additional factors at play.
For the most part though, I think the shidduch market has adapted to the mismatch. I think there’s a little game that goes on. If a girl says she wants someone who will “learn forever”, that’s code for a long term (say 5-10 years). If she says she wants 5 years, that means 2-3 years, and if she says 2 years, that means a few months, but he’ll be kovea ittim. For the most part, the boys play along. So the actual “learner earner” type are still in yeshiva, and those rare ones who are actually keeping serious sedorim while holding down a job are in high demand.