I think we fundamentally disagree on what "safely" means, yes. I guess it was on me for not asking what you consider "safe" to mean. As for "life is not without risk," the issue is that you aren't only determining what is an acceptable level of risk for you and your family, you're also determining what level of risk others should accept.

occasional quarantine if needed

And when it's the teachers that need to quarantine, what then? Who is going to want to go sub for a class where the teacher got sick from COVID? It's not just "oh, yeah I might have to pull my kid out from class every once in a while. Oh well." Each one of those kids you're packing 20+ in to a classroom at a time is a vector for transmission to parents, teachers, aides, grandparents, etc. Not all of those people have the benefit of being in an age group that bounces back quickly.

Because the virtual education sucks

Yeah, and people dying and being hospitalized with potentially long-term complications -- which we're seeing at record numbers right now -- sucks more than your kid not knowing parts of speech.