I don’t think the ‘us’ really means frum Jews. I think it is you big city dwellers who don’t come into direct contact with many dogs while growing up (due to the hardships of raising a dog in an apartment).
Those of us who grew up ‘out of town’ were used to most single family dwellers having dogs. In the 1950s and 60s dogs were routinely allowed to run loose…no leash laws enforced and in my immediate neighborhood I don’t remember a single home without at least one dog, including the Rav of our shul.
We have 4 dogs and a cat. They don’t eat commercial animal food, so kashrut is not a problem. They run in a fenced in yard, so walking them on Shabbos is not an issue either.
It is always amusing when our kids brought home friends from Yeshiva or seminary to see the ‘big city dwellers reaction to the dogs. First fear, then leariness, then patting and playing with the dogs. Finally not wanting to leave because they became enamored with the dogs.
One other observation: many parents in low income homes cast negativity about dogs to their children. It is hard enough to feed the family without all the added expense of a pet.