My follow-up comment, which you haven’t disputed, was that at a certain more advanced age (I guesstimated 26-27) the girls pool of available bochorim is considerable shrunk and she is at that point at risk of being left unmarried for life (per the age gap issue.) So at that age, girls will have to compromise on important issues.
And taking your viewpoint to its logical conclusion…
“No specific girl is certain to not have a close-in-age shidduch, so whether the odds are against her or not, few girls will compromise on an important issue.”
…you should likewise be arguing against NASI’s close-in-age (i.e. one or two years apart) shidduchim since, as you said, no specific girl is certain to be left out.