Uh TFA is talking about low income parents. In the tech sector here, it's the same. I can "work from home" to take care of a sick kid, or I can just use a sick day, which I have in plentiful supply, and avoid the pretense of pretending to work while I'm not at the office.

A waitress, housekeeper, janitor, or someone else who actually has to be at a specific place to perform their work, doesn't have that kind of flexibility.