Zoo mistreat counter arguement

I think that zoos are not abusing the animals from their natural habitat. They have food, care, family, and a close habitat in where they are placed at. Why do people argue this. People want to see animals. Zoos are not taking all the animals. People are arguing that zoos are taking animals from their nature habitats. I would focus on people who are actually kiling animals, such as slaughter farms. This dissapoints me that we have animal experts in zoos helping and caring for animals, and people decide to say animals are being abused. I know habitat is very essential for the animals. The zoo is not a jail for animals, its for us to observe the animals and some people decide to say oh well animals are bieng mistreated. The animals are not dying or suffering.