Show me any proof of this. I think this is gonna be a tough one for you. Absence of evidence is not evidence of absence - how do you make policy when you actually have so many unknowns?
Cloth masks have been shown to be at least 20-30%+ effective with current terrible usage, increasing with N95s. I personally don't agree with using them, but it is a far cry for someone to try to say that they are wholly ineffective.
With that being said, based on the risks to emotional health/interpersonal relationships, I believe we should accept the increased spread that would come with unmasking. But that is a different argument than "mask don't work."
There is 100% a scientific justification that isolation prevents spread. Don't see how that is unscientific. Sure, the kids may not die if they get COVID, but I don't see how you can argue that this wouldn't reduce spread to their families and therefore the rest of America.
The middle is the way forward. Maybe this is the fundamental disagreement that we won't see eye-to-eye on. Compromise and understanding is the way forward. An America of 330M people, not just half on one side or the other, is the right way.