It's a matter of demand and offer. If people were not going to zoos and aquariums there would be no incentive to operate for those type of businesses.

This is a moral issue, not one to be settled by looking at what people are willing to spend money on.

Just because people enjoy foie gras doesn't mean it's morally permissible to force-feed-to-death sentient beings.

Would you have the same thoughts about sex slaves or indetured servants?

Protecting an imoral industry because there is a demand for it is imoral.

Just to be clear, I am totally against zoos and aquariums. Just wanted to mention that a lot of evil activities in this world are caused by 'demand and offer'. The issue you mention, zoos, aquariums, killing of elephants, rhinos, and other animals for their furs and tusks, oil extraction, plastic pollution, onlyfans, etc would all not exist if no one was willing to pay for these things or services.

So what I wanted to say is that change comes from consumers, and as such if we choose to say no by not giving our money for anything immoral, we can kill those activities.

"This is it. This is the countdown to extinction." Megadeth