And that's the assumption that it's either work or family, that there's two boxes, and you either pick one or the other. I see this a lot in discussions online and with friends, this idea about your life being divided, this part and that part and it's your job to parcel out time to each thing like a mother bird dividing up food into hungry squawking mouths.
It's something I find quite odd, and after living in Europe for awhile I realized it was an especially American thing to divide up your life into distinct bits.