Thank you for clarifying.
By definition both marrying before 25 AND cohabitation are two factors that contribute to a greater likelihood of divorece down the road.
For me and my wife, from my perspective, the part of meeting young that was detrimental was, as you said NEITHER of us having a good sense of who WE were, let alone of how a ESTP/7w8 male and an INFJ/4w5 female were supposed to get along.
These differences manifested as ACTIONS not WORDS. Words (meaningful) were few and far between as she was reticent to engage me and I took it for granted that because a nuclear bomb had not gone off in my house that all was OK.
A picture is worth a thousand words.
Actions speak louder than words.
I dare say that actions, especially the right actions, at the right times, are worth a thousand pictures.