In response to one claiming that there is a chinuch crisis, that may be true, that may be an exacerbating factor – that more girls want learning boys than there are learning boys. But that doesn’t mean that the age-gap imbalance is not ALSO a factor: and so we are required to resolve it.
Now, personally, I don’t think that there is a chinuch crisis. True, it is POSSIBLE that INITIALLY too many girls demand a learning guy. But if that were true, those girls who are willing to date working guys should have a very easy time. And working guys should have hardly any dates. Empirically, that it not true.
Furthermore, even if it was true – even if too many girls are limiting themselves to learning guys – that usually fizzles out after a few years. Almost every yeshivish girl, by the time she is 25, and certainly by the time she is 30, is more than willing to date a non-learning boy. So the chinuch crisis problem which you refer two should, at worst, merely delay girls a could of years. But how does it explain why there are so many single girls in their upper-thirties and forties?