And even attempting to bring that up with someone is just inviting in an emotional tirade of "How dare you endanger everyone."

I read an article back around when this whole thing started. It explained the PCR test and all that. I tried explaining this to family, but it wasn't till months later that they could process this. Not that they even remember I said anything about it anyway.

It's as simple as saying "They can cycle the sample as much as they want to get the result they want." But whether the person gets what you mean or not is up to them.