@LolaSmiles. 8'm only repeating what the teachers on MN have said.
Correction, you are selectively presenting what some teachers on Mumsnet have said to fit the narrative you're trying to promote on this thread.
If you were trying to have a genuine discussion then I'm sure you'd have also included many if the things teachers have said need to be addressed in order to keep school as safe and hygienic as possible for all when we return.
You'd have mentioned the issues of toilets and hand washing facilities, or the logistics of school busses and those children who use public transport, the government's contradiction on face coverings. You may wish to explore some of the issues of schools running above their designed capacity and how logistically there's not enough rooms in schools to do some of what the government is proposing.
You might also consider exploring the issues teachers have said will affect working parents, for example if different year groups have phased start/end times or different days in school and a parent has children in multiple year groups then they may have issues with work and childcare.
You may consider that there's lots of teachers on here saying they really miss their students and want to see them again, that online learning isn't the same as having their kids in front of them, that they want things to go back to normal when it's safe to do so.
You may also consider the discussion teachers have been having surrounding the fact the DfE's scientific advisor hasn't actually attended SAGE meetings surrounding schools, and has openly admitted the scientific evidence is inconclusive on school risk.
But you didn't*
Why would I mention this? I'm suggesting a solution to this.