Pet owners are more likely to be healthier than others. You only have to look at people walking their dogs and connecting with neighbours at dog parks to come up with the reasons why. I know my dogs are the reason I walk of an afternoon after work. Because of them, I get more exercise, fresh air and sunshine in winter. Because of my dogs I know my neighbours and have made new friends.
The vibrations from cat purrs is said to be at a frequency used in treatment methods for healing and may lower blood pressure. My cat gives me little massages, it may not fix anything, but always makes me smile and that can’t be a bad thing.