They address safety issues for the public, but rarely for the animals themselves. Animals used in other entertainment industries may or may not fare any better. Non-domesticated animals are often not suited to life in confinement. Take a zebra for example. They are becoming popular as pets and have always been popular in backyard and private zoos.
Many zebras die in captivity because they break their necks running into walls or fences.
They do not understand solid barriers. There is no such thing in their native world. A tree can be gone around. A row of bushes, the closest thing to a wall, can be run through. But a brick wall cannot, and they are often killed in the capture or confinement that human ownership entails.