@grampster This.
Everything you are saying is spot on.
I also worked in a preschool/daycare, and despite people being well trained, they were not well paid and had a high turnover rate. By the time a child who'd been there since infancy was 4, they'd had about a dozen primary caretakers-- without the turnover which made it more like two dozen.
These were not a village of people caring for the child. These were employees with varying degrees of intention and educational background, with no biological imperative to give the best care to each and every child.
I want to see the longitudinal studies on mental and physical health on the children who are raised in daycares.
I was one of them. Sure, I was well behaved. Until I hit puberty, but even then I was like a trained monkey during school hours.
At 42, I still have trouble figuring out where all my anxieties and attachment issues stem from.
These studies are asking the wrong questions, unless it's well behaved automatons we're after in the parenting game.