Have you ridden the New York subway, or taken care of an infant? They're not crawling on the floor, putting random things in their mouth. And other subway riders aren't spitting at my child when I take her on the subway, either.
> Maybe parents should use cabs often. Cab fares should be included as part of child-care costs which most parents include in their detailed plan before they decide to raise a child.
In your magic world where cab fare is paid for, sure, I agree. But in the real world, there are people who can't afford cabs, but still need to take their child to the doctor, or to daycare, or to a family member, or wherever.
When we picked out our stroller, we definitely picked a smaller one - both as a courtesy to everyone around us, but also as a convenience for us. You think it's fun being bumped by a stroller in a subway car? Imagine how fun it is trying to negotiate a stroller through one. And onto a elevator. And on the street.