That is a valid point. I too care for my child and would, in fact, do unspeakable things to other people if I thought she were in danger.
Currently, my child is unvaccinated and is attending an in-person school (summer school at the moment to get ahead). While I understand your fears about children contracting the virus, all data points to them being able to skip through the symptoms relatively unscathed. This, of course, does not apply to ALL children because we are all different... but generally, children have an exceptionally high - north of 99% - chance of being unaffected.
While I share your desire for our general populace to live well/healthy, one would assume that those who care about COVID are going out of their way to obtain a vaccination. Those that cannot because of health related conditions are a bit of a concern, to be sure, but those are a vast minority of people nation/world-wide. The steps they take can easily counter-balance those who choose not to get the vaccine.
Finally, death is something that only the most sociopathic among us would truly wish upon someone else... but it is a function of our existence. We will all die from disease, bodily disfunction/failure or an abrupt circumstance; we are complex, mighty and ultimately fragile creatures. I don't believe that those who are on the fence or apprehensive about the vaccine hold that position to inflict suffering/death upon others. I do, however, believe that if those people feel that they have caused such due to their actions/inactions, they would live with that regret for the rest of their lives.
Again... people who can, should. But it's an individual decision and one that should be approached with logic, facts and after consulting a physician. The government does not have the right to force it upon anyone... or force it on someone by proxy (i.e., taking away constitutional rights if they don't comply). It's a difficult line to balance on... but I believe it is the correct path.