I remember learning about Dutch doors when I was younger because we visited somewhere (I don’t remember where) that had them, probably a farm. This would have been in the US. So why are they called “Dutch Doors”? Well, actually the Brits might call it a stable door and the Irish might call it a half door. But it was the Dutch who brought it into normal cultural use, through painting and their general use of the door in their housing.
In paintings fro the 17th century you can find plenty of examples of Dutch doors. It was also in this period that Dutch in the areas that would become New York and New Jersey were incorporating the doors in their homes. The purpose was to keep livestock out of the house and children inside while allowing light and air to circulate freely.
One can easily imagine working in the house, not having to worry about the small children escaping or the animals bringing their dirty feet into the house, while still being able to see and be part of the outside or chat with a passing neighbor. As a matter of fact, this type of door was later also incorporated for a time on railways to facilitate employees carrying out tasks or visual inspections.
Even into modern times, the doors could be useful in nursing homes (line of sight is maintained while the patients cannot wander aimlessly), childcare facilities (although safety concerns finally restricted this use) or barns and stables, where they were originally used. The romance of the past often makes people wonder about installing or using such a door. The practical limitations usually come to mind in later stages. But Dutch doors are still used in many places.
Have you ever seen a Dutch door? Would you want one in your house?