The fact is that chains are nothing more than inanimate objects. They are unable to jump up and inflict pain upon a dog. They are unable to feed and water, or neglect to feed and water dogs. They can't do anything by themselves. Same goes for kennels (indoor & outdoor), fences, leashes, walls, doors, etc. None of these objects of containment are capable of abusing or neglecting dogs.
I doesn't bother me if the dog's primary housing is on a chain. So long as the HUMAN owner feeds & waters the dog, gives the dog appropriate attention and exercise, etc.
Only humans are capable of abusing dogs and neglecting dogs and there are already laws on the books to address these issues. However, just like in any political race to see who is better, people want to make up new laws to make themselves actually sound "intelligent" and "caring" and look like they are doing something. But the fact remains that if the current laws were addressed and enforced, abuse and neglect of dogs on the ends of chains would be taken care of as goes for dogs that are abused and neglected inside the home, inside kennels, and so on.
The Hokey Pokey. That's what it's all about.