That's ridiculous. During the crisis times of covid, the incidences of other communicable disease dropped significantly. Plus, to be frank, this is just an idiotic suggestion with zero reasons to think there's some set number of days people are sick. Before having kids in daycare I was rarely sick. I had a child not in daycare and was never sick. Now we're sick all the time, which wouldn't happen if my wife could stay home with them or we didn't have kids.

Considering it used to be commonplace to have 10 children and then maybe 2/3 make it to adulthood, I would say we absolutely can and have reduced the total number of sick days. We've also reduced the severity of sickness.

We can and we have. Through things such as the measles vaccine.

People forget that child mortality used to be a thing.