@Christine615 I agree 100% . Every human body outside of the womb should be counted toward the maximum occupancy set by the host.
Hosts' occupancy rates are not a mere formality; they reflect so many other important considerations - local housing regulations, room and furniture capacity, noise, insurance restrictions, liability, and fire/evacuation safety to name a few. Hosts are on the front lines of all these factors, whereas inventory-free @Airbnb is willing to leave its hosts exposed to unnecessary risk just for the sake of marketing to families.
I'm not a parent, but it seems to me that it's detrimental and risky both to families and to hosts for Airbnb to lower the bar for parents to smuggle toddlers into homes that aren't designed to accommodate them. Here's a better idea: improve the search filters to make it easier for families with children to find properties that have indicated child safety features, and hosts that choose to accept infants. Make sure this specialized search is triggered as soon as any number of Infants or Children is entered into the guest count, and don't display listings that have "not suitable for children/infants" checked in their Policies.