Well you rather mis-represented that post, didn't you?
First lockdown I didn't have to teach live lessons, so I was able to work early mornings and evenings, and supervise/home school 6yo dd during the day while dp working. Now I am online doing live lessons all day so dd is going to school.
I know I'm very lucky as if I was in meetings all day in a non- key worker role I'd just have to suck it up and leave dd in front of the TV all day (dp not a key worker but also in meetings all day).
She's not sending him in because otherwise he'd be in front of the TV all day. She's sending him in because she's doing on line lessons all day. The Tv thing was a projection about if she was WFH in a different kind of job.