Oomis:
That is not the crisis. The crisis is having more girls than boys for whatever reason it happened.
Also the only evidence that your solution would change anything actually shows a negative effect, since the communities with more socialization actually have many more older singles, as DY pointed out.
Now, you say that perhaps it would be different if we would socialize but still keep our other haskafos. Perhaps, perhaps not.
So, since there is no problem to solve, and the solution is pretty ungrounded, I think I’ll do things the way I always did.