I have 3 kids.
I am wfh and my husband is wfh.
So, to access live zoom lessons, we need 5 devices with unlimited access to broad band, and 5 separate rooms so we don't disturb each other. Add on great broad band reception so that 5 pf us can be in live zooms at the same time.
Both the schools my kids are at have said zoom must be in a public place in their house, not in their bedroom (safegiarding). We don't have 5 spaces for all of us unless we use bedrooms.
We live on the edge of an affluent area, and many of the kids at school have expensive houses in villages. Those same villages that have crap rural broadband that has been moaned about and ignored for years. Most familes cannot access enough devices and enough broad band for live lessons all at the same time.
Our schools are doing a good job with power points, some with videos and audio set in, and carefully constructed work on downloads.
Then add on the problem that parents cannot support their kids while working, so for younger kids, parents may be doing something like work 6 am - lunchtime and then support school work in the afternoon. Doesn't work if lessons are in the morning.
Finally I have a friend who is a teacher at a private school and has to do 5 hours live zoom lessons per day. It is killing her. Every lesson requires 3-4 hours prep. As she has done nothing like this last year she has no resources from previous lessons to use, she is having to make them all zoom friendly from scratch. She is workign 17-18 hour days and all weekend. She fully expects to spend all half term preparing.
She does not have any kids of her own, if she did she would not be able to do it.