In some African tribes the men as a group take the boys at 13 out on a 10 day hunt and teach them life skills like capturing prey, skinning them and bringing home the meat for the klan. From then on the tribe considers him a man and expected to marry and take care of his own family from that point on. No excuses.
In contemporary modern times up until circa 1960s the same was more or less expected in most Western societies. What we see now is the growth of an extended adolescence clear into their 30s in our 'sophisticated' civilization. You tell me, who is the 'mature' group?