11% may even seem like a small number until you consider that not all the black men who have been incarcerated at least once in their life are currently incarcerated. 25% of black and hispanic men will face incarceration at least once in their life[0]. The incarceration is also skewed towards younger men who are one supposes potentially more likely to miss out on the formative years of their children's lives. It's also difficult for a strong family to develop in this situation imo. Life is about getting a good start and keeping that momentum going as steadily and predictably as possible.

[0]https://bjs.gov/content/pub/pdf/Llgsfp.pdf