if all zoos and aquariums were shut down, public concern about the environment would slowly drift to nothing within 2 generations.
Recently there was a obviously necessary mass culling of baboons in the Nuremberg zoo which shows some of the controversy [1]
[1] https://www.greenmemag.com/animals/the-nuremberg-zoo-controv...
Im argueing against nature preserves in poorer countries, where western nations deluded citizens pay to keep a piece of nature which are basically mirages of "intactness" in economic good times, vanishing from the earth entirely in economic bad times. Which the very same proponents usually argue for with degrowth arguments.
In the wild sanctuary it will have space to roam.