It muddies the point, because having 1 worker at a time (watching 4 kids) isn't really 1-to-1. And doing 24h shifts means kids have a different caretaker quite often, which complicates conflict resolution and other things that may span days.

Regardless, it's probably the best they can do and likely far better than orphanages with 20+ kids per adult. So the core message about scaling does stand. Even if the ratio described is actually worse and less scalable.