I'm assuming that you are referring to my earlier post.
Anyway, I think that, unfortunately, most people do think of their pets as their children (which is unhealthy, but understandable). Domestic animals rely on us for companionship, food and shelter, and have no real defenses against abuse and violence. They also develop strong bonds of loyalty and affection. The difference is that they never grow out of that relationship. Unlike a child, most animals will remain dependent until the day they die.
I was in charge of a nature center at a summer camp when I was a kid, and I worked with a lot of small family farms. I remember one family in particular kept a beef steer as a pet. He was such a friendly animal, like the biggest dog you've ever seen. He would just run up and beg to have his head scratched. The family could not bring themselves to have him slaughtered. He had a profound effect on me, because he was not only like a child, he had a real emotional connection to people. Most animals don't have an interest in people, it's true, but they undoubtedly have the capacity to form emotional bonds, given the right conditions.
I don't think Morrissey is being at all naive when he says things like this, I think he's being empathetic to an exceptional degree, which is not something that everyone can understand.