Gender exclusivity isn’t new, but it hasn’t been so starkly articulated as public policy in generations. It arises from the common belief that black men are exceptionally endangered by racism, occupying the bottom of every metric: especially school performance, work force participation and involvement with the criminal justice system. Black women are better off, the argument goes, and are thus less in need of targeted efforts to improve their lives. The White House is not the author of this myth, but is now its most influential promoter.

The evidence supporting these claims is often illogical, selective or just plain wrong. In February, when Mr. Obama announced the initiative — which is principally financed by philanthropic foundations, and did not require federal appropriations — he noted that boys who grew up without a father were more likely to be poor. More likely than whom? Certainly not their sisters, who are growing up in the same households, attending the same underfunded schools and living in the same neighborhoods.

The question “compared with whom?” often focuses on racial disparities among boys and men while overlooking similar disparities among girls and women. Yet, like their male counterparts, black and Hispanic girls are at or near the bottom level of reading and math scores. Black girls have the highest levels of school suspension of any girls. They also face gender-specific risks: They are more likely than other girls to be victims of domestic violence and sex trafficking, more likely to be involved in the child welfare and juvenile justice systems, and more likely to die violently. The disparities among girls of different races are sometimes even greater than among boys.

Proponents of My Brother’s Keeper — and similar programs, like the Young Men’s Initiative, begun by Michael R. Bloomberg in 2011 when he was mayor of New York — point incessantly to mass incarceration to explain their focus on men. Is their point that females of color must pull even with males in a race to the bottom before they deserve interventions on their behalf?

Women of color earn less than both white men and their male counterparts from the same ethnic or racial groups, across the spectrum. Even more disturbing: the median wealth of single black and Hispanic women is $100 and $120, respectively — compared with almost $7,900 for black men, $9,730 for Hispanic men and $41,500 for white women.