It shows the difference between cats and dogs.
Cats can be trained a little. But mostly they socialize on their own terms. They can be difficult sometimes, but it's mostly knocking something over, or wrecking the drapes.
Dogs need training. Mostly they love training. Teach them...and they will learn. Socialize them, and they will learn that.
If you can't be bothered, get a cat. Pet it, hang out with it, meet it's basic needs.
Don't get a dog. This is often the result. An unsocialized dog who causes trouble, gets into trouble, and is now dead.