Actually, more and more evidence suggests that having a stay-at-home mom is worse for children :(
In a new study of 50,000 adults in 25 countries, daughters of working mothers completed more years of education, were more likely to be employed and in supervisory roles and earned higher incomes. Having a working mother didn’t influence the careers of sons, which researchers said was unsurprising because men were generally expected to work — but sons of working mothers did spend more time on child care and housework.
Some of these effects were strong in the United States. Here, daughters of working mothers earned 23 percent more than daughters of stay-at-home mothers, after controlling for demographic factors, and sons spent seven and a half more hours a week on child care and 25 more minutes on housework.
I always assumed it would be the other way around, but I'm glad people are conducting actual science on the question.