“Let’s assume we all became shadchanim & managed to marry of every last frum boy aged 22-39 in the US. How many girls would be left single? Many hundreds if not thousands.”
I do not think that is true, and you have no data to support it. You claim to see that, but I see the opposite .
At any rate though wouldnt it be wonderful if “every last frum boy aged 22-39 in the US. ” was married. Lets work towards that and worry any possible remaining girls later
“How does Redding a shiddach help the situation?”
As a big rebbe once said the biggest segula to get married is to date. If more girls get dates then more girls will get married) (or at the least progress to step 5 in the outline I layed out earlier)
“f we get the girls in the market engaged now before the next 1000 girls enter the market they will have less candidates to compete with.”
Its not a closed system. Girls and boys are constatly entering “the market”