How is it justifiable not to do live lessons?
Research, and even the government guidelines, all state that live lessons are usually no better (or worse) than pre recorded lessons.
Not all schools have the means to do live lessons effectively.
Not all school communities actually want live lessons.
We have 40-50% of children in school right now. All of our teachers and TAs, bar one, are in school full time with classes. The teachers get 2 half days out of class for producing remote learning and giving feedback, for found a daily welcome video as well as the lessons, for calling families weekly and for doing a short live zoom call for the whole class. . They do the rest in their own time. The one not in school (me) is due to health conditions and they are overseeing all remote learning, setting it all up, providing almost constant contact points for parents via messaging and email - long long hours right now.
Our school catchment and community is not ideal for live lessons. The vast majority of our families don't want them. Many of our children (infants) don't enjoy the live weekly session as it is, many find it too much and don't live being on the screen and/or seeing their teacher/class in the screen. We have a lot of families who,are working from home, sharing devices with parents and siblings, who don't have several devices, who don't have a lot of wifi, etc, so,this is why we justify non live lessons.
Some people, on MN mainly, think live lessons are the golden ticket. Reality is that for many they just aren't suitable and alternatives are a better solution.