Let’s say there are 10 boys and 15 girls in the shidduch pool, so now 33% of the girls will never get married. If one of those boys now goes and marries one of the girls there are now 9 and 14 left, so now 35% of the girls left will never get married, so anybody who gets married – no matter what their age – is making the crisis worse.
Unless of course, one of the boys goes and marries 2 of the girls. So there are now 13 girls left and 9 boys so now only 31% will never get married.
In conclusion, the only way to solve the crisis (assuming as we always do, that there are more girls than boys) is to rescind the Cherem D’Rabbeinu Gershom