Of what pattern, pray tell, are you speaking? Bet many boomers got married at that age, or younger. As did our parents.
I was married at 23. 32 years later I am married to the same man and my only regret is I didn’t marry him sooner. My son was married at 23 his bride was 21. Three years later they are expecting their first child and he will finish grad school and be ordained this spring. Marrying young is not a problem. Who you marry at any age may be.
Was married a few months after my 19th birthday. 33 yrs, 6 children and 4 grandchildren (so far) later, still married to the same wonderful woman.