Freakonomics: Most fathers are either not married or have no children

This is a realisation I made when researching for data around fathers as I want to figure out who I can help most with Marathon-Crossfit for forming new habits. My hunch is that based on my experience and background I can help stepfathers, adolescents without a father and single mothers most credibly. This would be based on forming better habits and discipline as these always helped me excel.