I think some go as far to verge on being child abuse. To keep children in a fearful heightened state of anxiety all day is abusive, it’s not ok for some to not be fearful to excuse it. To not allow basic needs to be met, for example by having 10 minute breaks, no toilets in lessons and 1400 pupils to about 20 toilets for 5/10minutes with punishment for lateness can leave teenagers unable to access toilets for a whole day.
There are schools near me that punish for looking at the clock and don’t allow talk except for with the teacher to answer questions. That means no debate or asking questions, if you check out blooms taxonomy of learning that’s pretty low down the skills they need.
Adults don’t work in places where they can only wear uniform that isn’t offered for all body types, for example in Tesco any smartish trousers and shoes can be worn with their shirt. On building sites as long as the boots are steel toe capped it’s ok and so on.
Can you imagine trying to work if you were on a heavy period in a skirt and unable to deal with it? Punished if you forgot yourself and looked around? Punished if you needed to stretch or deal with pins and needles and moved too much? Were sitting in 28/30 degrees in a jacket with no drink? Managing a 28c day but avoiding too much water as you had no toilet access most the day?
All you’d be thinking about would be the rules and trying to feel ok and your anxiety. Your brain would have near zero space for learning or task completion to any standard. Kids aren’t any different to us.
I’ve taught teens in rough schools. Strict schools often managed by essentially dumping SEN children off roll completely, or denying them education until they left (eg isolation every single day for very minor things like movement breaks being denied at the child randomly standing, not full on disruption). As a rule I also found the relaxed schools easier. I will admit though some teachers weren’t kind, for example keeping blazers on in every hot lesson in summer (and in a school it’s often a particularly hot room).
As a last point, most parents don’t have a choice of schools. Even if they apply to ones of choice they get their local school, at best there’s maybe a choice of two very similar schools.