Some men back in the days of literary England men kept "journals."
American men? Not a diary or journal to be found in any of the 50 states and territories. THAT would be for pantywaists!
I have one of my favorites in front of me..."The Journals of Samuel Kirkland", 18th century Missionary to the Iroquois etc....
Nowadays young men post their diaries/journals online, hoping that somebody beyond their circle of family and close friends cares enough to read them. And they don’t, because it’s usually just pointless babble and mental masturbation.
You obviously haven't studied American history much.