Plus, I think young adults being treated like children for too long has led to a lack of maturity. The fact that people are waiting until their late 20s or 30s to get married and have kids is a problem (and I recognize that, being 25 and unmarried, I'm not helping the statistics myself).
People are not waiting until their 30s to get married and have kids because of "lack of maturity", lol. This is literally what happens in every country as the population gets richer and more urban. Having kids early is for people with nothing to live for in their own life.
Yup, pretty good take. Additionally, more young people tend to start an actual job later as more and more of them seek a higher education or take the opportunity to spend a year abroad. Not having kids before you can actually make sure to have the financial ressources is a sign of maturity and not the opposite.