“Hermetically sealed bubble” was a bit of an extreme description of your (largely unspecified) alternative to sending kids out into public, but personally I feel there are many good reasons to send kids out to e.g. the park, the grocery store, the street, the bus, the library, later to occasional organized classes, etc. (e.g. so they can learn many skills including socializing with peers and the community at large) without all that much evidence of significant risks. Small children living among communities of humans pretty much inevitably get sick at least several times per year, even in relatively small and isolated agrarian societies. By most objective measures (and especially if we disregard effects from terrible diet and sitting staring at screens a whole lot) children today are incredibly safe and healthy compared to past children.
I agree it hasn’t been especially constructive, but I’m not quite sure why you were and are so wound up and negative about the conversation here.