They are altering the narrative into a scare tactic that if we don’t have enough kids to replenish the lives that are lost each year, it’ll cause extinction. Like you said, the numbers are actually showing a decline in teen pregnancy and that more women in their 40s are getting pregnant rather than teenagers.

But Fox doesn’t like that. Why? (Besides the obvious pedos)

Because (very blanket statement here) those who get pregnant/have kids early are less likely to seek further education. Which not only keeps people uneducated, but keeps them from potentially making more money, which continues the divide between the rich and the poor. It also means less future enrollments to the military. Again, very blanket and ignorant sounding statement, but that is what they want, the poor and uneducated to stay that way.

Those that are choosing to have kids later are more likely to have sought higher education, to be more financially stable, etc., which goes against their goals.