You think the reason that most children who receive a comment about their bad behaviour on paper from a teacher to take home and show their parent which then “mysteriously vanish” before their parent sees it is due to management and not the most painfully obviously logical explanation that the child doesn’t want their parent to see the comment?
An electronic system means that the parent can see the logged sanction or demerit with hopefully a comment from the teacher about the incident. I agree it’s frustrating as a parent if you only see the sanction and have to rely on your child’s account of what occurred or haven’t had a reason for an isolation communicated to you but this will be a rarity. The vast majority of schools will describe the reason alongside the sanction, even if it’s a brief comment “e.g continually talking over teacher for duration of lesson” or “deliberate vandalisation of display board”.
It’s a win for everyone. It’s easier for a teacher as they can do it for multiple children for the same infraction, they can do it for children who refuse to or are unable to present their handbook, they can log it at a later time when they may not be in the company of the child etc. and it means they do not waste time and the learning of others by doing it in class when they can log it after the lesson. It’s a win for parents as they are guaranteed to see the comment (as long as their email isn’t intercepted by their child) and it’s a win for the child as there is an electronic copy of the comment that every member of staff can see. This is paramount for safeguarding, intervention, patterns of behaviour, record-keeping etc. For things like exclusions or SEND intervention, incidents involving drugs or weapons or assaults, you need evidence of historic and logged incidents every time.
EDITED: In fact, the more I think about it, I’m pretty sure an electronic log/communication of the misbehaviour over paper has to be a legal requirement. If all behavioural infractions were communicated on paper, there would be no record kept about what was said to parents or a list of all the incidents that had occurred. The school and the police have to be able to see all data. How could safeguarding, exclusions, suspensions, prosecutions take place unless recorded electronically? You need a trail. All incidents have to be logged.