Total BS. People don't grow up until age 30 these days. They are more immature than ever before.
Historically, they would have starved to death for their delayed mental growth.
It was a good system, and only modern society has ruined it.
The public schools don't teach maturity or academics, but they do teach (24/7) all there is to know about sex. Heather Has Two Mommies starts in Kindergarten.