That just means that contemporary woman is not seen as shirking her mom responsibilities when working. While the children are definitely seen as mothers primary responsibility, working is part of that. It also means that there is less expectation on women to be artificially nice or helpless and dependent compared to American stereotypes.
Unlike in America, woman working is not interpreted as woman being anti-family. Unlike in Germany, mom working is not interpreted as mom failing her kids.
Also, it is not like the first women stepped into Russian factory only after revolution. The women did worked prior that, obviously. Whether on rural farms in villages or in factories or as cleaners or selling stuff at marker etc. The aristocracy expected women to not work, but generally Russians have been poor and had to do stuff to survive.
I have never thought of having more women in the workforce as "anti-family", and will definitely research on that, but personally I am happy to have a more diverse workforce and not stigmatize men if they want to stay at home.
I dont think Eastern Europe is the place more accepting of men staying with children at home.
In lieu of their mothers, children need to be looked after by professional caretakers. This weakens their bond with the mother. And even in the evenings, when mother is back from the job, she's beat and can't give the same level of attention to their children.