Kids in school, even if not with their usual teacher, are much better off.
I'm not sure. The autistic pupil, whose 1:1 has been pulled off to cover another class (teacher off, no supply available) and who is now in a class with an unfamiliar adult, and where the class is chaotic because that unfamiliar adult is normally a lunchtime supervisor? That autistic child has two safe places - home and school. School is not their familiar safe place, without the usual support and without a qualified teacher who knows them.
So their behaviour deteriorates even more than that of the rest of the class, and they have a meltdown and lash out. That classroom is a lot less safe for all the children now.
Unfortunately, the Head and SENDCo are both off with Covid.
Are all those concerned in that situation genuinely "much better off" in school? It's not a rare situation, either - it is not remotely uncommon to have at least 1 child with an ASD diagnosis in every primary class, and even those who manage very well in mainstream art normal times will find things much more difficult in periods of chaotic staffing.
I use the ASD example because it is pertinent to me, but children with a whole range of SEN will similarly struggle and may not be better off in a chaotic understaffed school.
Yes, children from abusive home backgrounds will have school as a 'safe haven', and schools are a key part of safeguarding, but whether they are doing these roles really well - or at all - in periods of chaotic understaffing with few teachers who know the children present.