Let me play the devil's advocate here.
First of all, it is important to make the distinction between, for example, a tiger (a living, breathing creature that can feel pain and discomfort) and the tiger (Panthera tigris, a species). The species is a collective which cannot actually experience anything, even if it is comprised of entities that can. It can therefore be argued that the welfare of individual tigers is of greater moral importance than the species as a whole because, again, the species cannot literally suffer while the individuals can. And given how prone tigers are to behavioural abnormalities (and thus likely associated welfare issues) when kept in captivity, plus the widespread idea that (the vast majority of) captive tigers cannot be introduced into the wild anyway, I think this argument actually does make sense.
Obviously I think there are flaws in this argument*, otherwise I wouldn't frequent this site or visit so many zoos. But we should be careful that we don't become an echo chamber, and realise some values unquestioned here (e.g. the inherent value of a species) are not shared by everyone.
* I think several of them become obvious if you know I deliberately chose tigers as an example