There is one problem there are NOT the same amount of boys borns as girls. In fact worldwide there are between 105-9 boys born for every 100 girl (in China it is 120:100 but that is for other reasons).
So the shidduch crisis thing falls.
There is has been a string of letters in the Yated from the “Shidduch Study Group” trying to collect real data on the “crisis” They have a survey online and they hope to bring some facts to the table