You’re right for younger children but for older children in school you can definitely handle it while working remotely. You just pick them up from school and then they can mostly do stuff on their own the afternoon. But if you have to go in office suddenly that doesn’t work anymore.

To expand on this a touch, kids are only in school for 6 hours a day. For ages between kindergarten and grade 4 or so, it is generally frowned on to let them make their way home alone. A single parent with no child care cannot be in an office for 8 hours straight.