That’s true, but the claim was that getting respiratory viruses is good for overall health, because sterility is bad. Sure, our germs make isolated people sick

That’s true, but the claim was that getting respiratory viruses is good for overall health, because sterility is bad. Sure, our germs make isolated people sick, but are we healthier because of the respiratory viruses, or are we merely germier? OP seems to be arguing the hygiene hypothesis applies to respiratory pathogens.