I expect the causality goes both ways, for example maybe you wouldn’t consider having a dog because your stressful job takes up too much of your time, or you don’t have the money to pay for dog food and vet bills, or you live in a tiny apartment in the city and it would be cruel to keep a dog there, or you don’t have the time or energy to take a dog on walks, or you just don’t like going on walks or you’re afraid to go outside, or you can’t cope with raising a dog because of some health issue, or you have terminal cancer. In which case it’s the dog-incompatible situation that’s the issue rather than lack of dog.