I like dogs but they're a lot of work. I mean, I know birds are too, but I don't need to walk a bird every day because it's small enough that flying around the house is good enough.
Also even if you get a dog a friend they want you to constantly pay attention to them. Birds are fine with spending time with a bird friend while you're at work if you make sure they're compatible and you don't accidentally convince your bird that you're their mate lol