I’m a little short on time, but briefly:
Which characteristics of Lakewood girls do you think are silly to be important to a prospective husband? Are they wealthier and prettier than others?
You didn’t address my main point: the choosiness is a product of the disparity, so if somehow the disparity would be decreased, more girls would get dates, and, more importantly, get married. IOW, if boys didn’t have as many choices, they would broaden their criteria.
If there aren’t enough marriageable boys in the shidduch pool for the amount of girls, evening out the dating can’t get all of the girls married.
Of course the main (though not only) problem is the numbers.