That would be my conclusion. We do not, as a habit, open the storm door (a concept that I was unfamiliar with in my earlier years) unless we are inviting the person into the house, and this happens only with very few people.
American homes, especially in the past 30 years, tend to have windows on each side; to my mind, this negates the purpose of the storm door, especially since the latch tends to be close to one of those glass panes. I believe the façade of NG's house was brick (faux brick?) so the gate (if I am correct it has metal mesh on it, making it more substantial) would be opened to let someone she knows into the house.
Just thoughts and opinions of mine. I am not an expert or privy to any other information.