People limit pets' movement all the time. Dogs go on leashes or are stuck inside the house. Same with cats, often. We have 2 rabbits. They have to stay inside their pen when not accompanied by humans. Our tortoise has to stay inside its terrarium. Our fish may not swim in the ocean. I'm sure the rabbits would love to run around outside or even all over the house chewing on whatever they can, but it's not safe for them (predators, cars, electrocution), and it's not safe for our stuff. So maybe you're saying nobody should keep pets, but that's a different argument.