This sounds like so much crap.
Except for one thing.
Sixty years ago, we had to sit in a disciplined way through out the school day. After school we could run around all we wanted.
You see, there was limited TV, no video games, and if we pestered Mom she’d run us out of the house with the admonition ‘You children go outside! I’ve work to do!’.
We got lots of play time 60 years ago.
What we didn’t dare do was be a nuisance or a distraction in the classroom. If you didn’t get a paddling from the principle you’d certainly get a taste of the belt when you went home.
I remember when a mom working at home and raising her kids was considered normal too.