I am a teacher and I absolutely would love it if schools stayed open. I worked throughout lockdown (school by day for keyworkers, my own class online at night, in lunchbreaks, etc). We did our very best but in school is preferable for most kids.
That said, I have worked really, really hard to get my class (parents and children) ready for online learning in case we do need to close. I can already see it is not as successful for all families. There may be lots of reasons - poor Wifi, busy parents, lack of devices, multiple children...
If we have to close, a controlled closure that we plan for would work much better. We could then send home suitable material for those who don't easily access online materials. We could make sure it is not mid-way through a unit of work, etc. Some of my scheduled lessons for next week need a group / a playground, etc. I would teach them earlier or later, for example, if I knew a closure was coming.
Above all, I feel that by denying the risks in schools, we are rendering ourselves unable to talk about how to mitigate or plan around those risks.
When writing a risk assessment you would usually look at the likelihood of a risk, severity of a risk, and then mitigations. If we can be honest about the likelihood and severity of covid risks in schools then we can work out how to best mitigate them - open windows, part time school, hiring other space, circuit breaker, masks, or whatever.
Just like Ocado drivers didn't take plastic bags back during lockdown but now will however the householder puts them straight into a special bag. Someone has looked objectively at the risk and worked out how to mitigate it.
Singing la-la-la-there's-no-risk or calling teachers work-shy is not a great way to solve any problems.