It’s a sad reality of the human species that for most of our time on this planet, most men had no children, and the men who did have children had them by a truly startling number of women. In some societies, 17 women had children for every man who left descendants.
It’s good to be king. Or Khan. Or just a village chief.
Male DNA tends to vanish where female does not.
Guy has no sons and his Y line vanishes.
Woman has no daughters and her X line will still show up in her granddaughters.