If one parent does this and expects work sent home, I have to;
Message home. Get reply. Print reply. File reply. Open SIMS. Enter in reason for absence and duration of SI. Open list of classes. Email the teachers (assuming none of them are ill/SI) and the HoY requesting work. Then I have to wait for them to have time to reply, provide work for the next fortnight, which all needs to be saved and formatted so it can go out. I then have to send multiple separate emails due to the size of attachments for each subject.
Whilst I'm providing an individual concierge service to Parent 1, I'm not dealing with any other parent or child. There will be kids who are taken ill at school. There will be kids who haven't turned up and parents aren't responding to messages. There could be kids who are at risk not turning up. But I'm spending my valuable time dealing with the one child because if I don't get the work sent through asap, they'll be in touch complaining that there hasn't been any work provided.
Multiply that by 10, so ten kids in all being kept off, and you've taken up my entire day just in sending bloody emails. No time for my actual job.
And then repeat the whole process in a fortnight's time. And two weeks after that.
Make that 10 kids in every subject/year group or form and the entire system screeches to a halt and you aren't going to get any work at all, so they're having less support than during lockdown.
Just stop taking up a school place that you don't want. Deregister and we can give the place to a kid who desperately wants and needs it. And I can get back to looking after the welfare of the children who are there.