^I think some people own dogs simply for a power trip. They like the idea of controlling a "lesser" being. They want to assert their dominance over the dog. They don't actually give a shit about the well-being of the animal, but you can bet that if someone tries to intervene and take the pet away, they will flip out and get angry that anyone would even consider messing with THEIR property.
Sadly, some people treat their fellow humans this way as well. Assholes make me sad.