Working Moms Good for Daughters?

Tyler Cowen argues that "...If a mother works, her daughters are more likely to earn an income commensurate with their familial status. Working moms should feel less guilty..." Well, that's only money, Tyler. Are those daughters happy? Are those daughters not lonely? I don't find the argument compelling. My take: working moms should feel less guilty (if they raised daughters who turn out to earn high income and be succesful and be happy and...), and so should non-working moms (if they raised daughters who turn out to earn high income and be succesful and be happy and...)