AZ, if demographics are going to be the driving force behind making shidduchim, you will need a 1000%, universal gezeirah across the board of all leaders, and guaranteeing bracha and shalom bayis from this. I don’t know if there is that level of ruach hakodesh around these days.
And I really don’t want to go here, but l’misparam it takes a certain amount (and let’s go minimum) to raise a child till 18 (or if you’re offering support, say 28). What are the conclusions we are to draw from THAT???
There is nothing wrong with suggesting a shidduch between 2 parties of the same age, if EVERYTHING else is there. We just can’t make it the defining criterion.