I concede, you are right. Crikey @Araminta1004 this is MN, this never happens. Genuinely thank you for that.
The whole they need to learn predictability and structure and a rule based society primarily.
or is it more expediency/born out by resource constraints (not enough staff to meet need) to primarily control vast numbers of children to get as much out of them as possible in the challenging circumstances?
No, I don't think it's at all about them 'needing to learn predictability'. I think it's very much about getting them into a position where they'll actually learn something.
During covid, the structure of school was removed, kids were set work to do at home and parents were coming onto MN in large numbers saying 'I just can't get my child to do their schoolwork'. They thought online lessons were the solution because teachers can get their kid to do the work at school, so they'd be able to get them to do the work in an online lesson. No, not from my kitchen I can't. Not without the weight of the school machinery behind me.
The vast majority of effort that goes on in schools is based around getting the kids to do the work. If you have kids that actually want to do the work then you are playing on extremely easy mode. If, like most schools, you have kids who would rather be chatting to their friends, on their phones, out doing activities, or hanging around in gangs terrorising the elderly and stealing from the local mini-mart then you have got much more of a battle on your hands.
I've got friends and colleagues who have taught/do teach in extremely strict schools and what they say about it is that you 'can just get on and teach'. What's the point in all the petty rules? Kids will come into a classroom on time, sit down, get their books out and crack on. When the teacher wants to talk, they'll be silent. Because they've been trained to follow the rules.
This generation of kids were raised by parents who watched Supernanny where everything was sitting on the naughty step and then talking about your behaviour. Negotiation. Kids have not been raised to be obedient to adults.
I do not teach in an extremely strict school. We don't have silent corridors and you know what? Kids are late to lessons. They piss about in the corridors. It is so noisy. We have sanctions for lateness but they are not very effective because the culture of doing what you are told, when you are told isn't there. We have the 1-2-3 and detention system that you favour and so much time is lost to messing around and then arguing the toss.
However, even with all that, we largely manage to get the kids to do the work, because our cohort is generally not that challenging. We have had stricter behaviour policies, and behaviour improved. We slackened them off, and behaviour got worse. We really slackened them off (Paul Dix, When the Adults Change Everything Changes) and behaviour was absolutely appalling - us becoming stricter was a pendulum swing from that.
What of schools who do have really challenging cohorts? If you had a school like the one I taught in where sexual and physical assaults were fairly commonplace? How would you turn that school around into a place where kids actually do the work? The thing about the strict school policies - they are effective. Sweating the small stuff is effective. I mean, that's why the military do it. You might think that moaning about a half untucked shirt is petty, but if it means that teachers can actually get on and teach - is it really that petty? If the kids would otherwise be having fights or sex in the toilets, is it really that petty? That's the behaviour that is being addressed being super strict about other stuff. When you see parents moaning about super strict school policies, what was the school like before then? Generally, not a great place.
(as an aside, sometimes you see parents moaning about 'super strict' policies and schools being overly authoritarian and actually it's something that's just perfectly reasonable like not letting kids go to the toilet whenever they want to, or expecting them to bring a pen. Those parents are really infuriating).
I'm not particularly authoritarian, I couldn't teach in a super strict school. I think some of them definitely go too far (e.g. Outwood Grange and their flattening the grass). BUT is a school that is really strict where teachers can teach worse than a school full of kids running riot and learning nothing? Because for some schools, that's actually the choice.