One of HAWS adoption requirements is that the pet must be an indoor pet. Our feeling is that we are adopting our animals out in the hopes that they will become companion animals -- members of the family. If the animal lives outside the humans in the family are less likely to form a strong bond and attachment to the pet. And obviously a pet that lives inside the house is going to spend much more time with their people than one living in the backyard.
I realize that I'm very much an exception in pet ownership -- my dogs share most aspects of my life -- they come to work with me, we hike together, snuggle on the couch as I'm reading or watching a movie on TV. I certainly don't expect that most people will have the strong love and attachment for their pets that I have with my dogs. But I would hope that any pet owner would love their pet enough to enjoy spending time with them on a cold winter day.