Ah, but the young women weren't being shown as more mature and ready to settle,. On the contrary, they had stars in their eyes about a WEDDING where they're queen for the day, but realize they can't afford it. So they have a kid, thinking it'll lead to a happily ever after life. Not mature.
Maybe not entirely their fault (or the guys), since pop culture has Ben leading tand pushing them in that direction for quite a while. Anyone who can't or chooses not to think and plan their life a bit is vulnerable to just following along.