I completely agree that we should be kind to single and childless women. In the same way, we should be kind to other people. We should not make assumptions about what other people's lives are like.
However, this sentence struck me. It says a lot about work culture in the U.S. Americans overwork themselves. If you are someone’s boss, don’t ever give anyone work to do on the weekend. This is part of a toxic culture. Overworked people are not happy.