Covid is contagious enough that most people are either going to get it or have had it. Why we should sacrifice children's well being to marginally delay the time at which their parents or families will be infected is beyond me.
If individual families want to choose to take their kids out of school that should be their choice. It should not be the default.
We are now nearly in the situation where most people have had it and the virus shows no signs of abating. This is not a bleak outlook simply a realistic one. You've either had it or are going to get it. The bleak outlook is the one that says you should cower alone and apart from friends and family until you do get it. Go get vaccinated and live as before.
Again, you aren't sacrificing the teacher's well being. The teacher is, anyway, most likely going to get covid. If a teacher doesn't like being exposed to children they should resign or be fired. Schools are not for the benefit of teachers but for the benefit of children.
Once vaccinated you are unlikely to require hospitalization. Actually, you're unlikely to require hospitalization regardless of vaccination but especially unlikely once vaccinated. Maybe it's sensible for people to make some minor changes to "flatten the curve" but going to remote school is no minor change and it is far worse than the negligible benefits.
While it's true you can catch the disease multiple times subsequent infections are less likely and less severe.
Get a different job. If teaching would put your children at risk, you should not teach.
Whatever a small number of teachers or students need we should not rearrange the education system for the benefit of edge cases. We should optimize for the typical case - average health people, and make adjustments to support the edge cases, not the other way around.
It's rare to be able to completely eliminate a risk.
Both of the extremes in this kinda drive me batty. On one side, I know a family that was taking distance learning as a chance to travel the world with their kids, before any vaccine was available. They have caught covid 3 times now.
I also know people that have resolved to never get covid. Why? Because it's covid. Any attempts to discuss things in more detail brings out comparisons to things such as the bubonic plague, measles, and drinking water you shit in.
I got an email this week that story time at the public library is canceled because of covid. No adult venues canceled.