Whoever agrees that the age gap is a significant cause of a disparity resulting in a larger number of girls in shidduchim than boys, resulting in a constant percentage of girls being unable to ever marry, must by definition agree that to mostly or at least partially correct that crisis the following two steps will significantly help, if not they’re being absolutely critical to fix the problem:
1. Boys getting married notably younger than the current trend.
2. Boys marrying girls their own age, rather than an average of being three years older than their wife.
It seems apparent than both these steps could be much better accomplished, if not perhaps the only way to implement them on a consistent basis in the future, is for far more parental involvement in choosing shidduchim’s timeline (age) and partner (spouse).