If a woman wants to be taken care of, more than likely she will have to marry an older man. Men in their 20s, (most) are not set up to take care of a woman. 50/50 is the standard or 60/40 in most cases.
Women don't want broke dudes, so what age range does a man make his most money? 20s, 30s, or 40s and so on??
Even Mary (young virgin) got with Joseph, he wasn't 22 or 19.
A father just has to really mold the daughter on what the results could be from dating an older man or younger man. Women hit their prime around 24-26, Men hit their prime around 45-55.
The creator set it up that way for a reason.