Do you turn to a shelter or rescue group when wanting a pet. Do you suggest that to others, as well?

All of my pets have come from the Humane Society. My sister picked up a kitten at a pet store, and just last week, she told me that she was thinking about purchasing a puppy from there (she was all excited). My response, “why don’t you get a dog at the shelter, or rescue one (I sent her a link to pet finder).” I think that she was a little put off by my email, but, who cares?