Why are people in their 20s far less independent than their parents in their 20s?

[Who Me?]

I see 'funny' posts from social media about lack of self-sufficiency in people in their 20s. I mean, we all make mistakes in our transition to adulthood. However, there is so much humor about being almost 30 and still wasting your money on booze, not being able to do laundry, not being able to carry a relationship etc. It's mind-boggling to me because my parents married at 25. In fact my parent's generation (who are in their late 40s/early 50s now) were independent, married, had a home and having children before 27. Today we are tolerating this idea of 27 year olds being giant teenagers. Obviously not all 20 somethings are like this, but too many are and we aren't encouraging them to grow up but rather laughing about the fact that they are almost 30 and act like 17 year olds. I am not claiming that 20 somethings need to marry and have children soon, I was just comparing the level of responsibility and maturity the previous generation had vs todays 20somethings.

Now I know some things aren't in our hands. I don't know how my Dad was able to buy a house, a car, and support himself at 23. I'll be 23 next year and I'm not even close.