when we are the cause of the impending extinction, yes. When an ecosystem can totally collapse because of a few missing participants due to extinction, yes. "Caging" the species is no longer the way that animals are kep[t, in fact, one of the biggest things that zoos now have are ecosystem"architects" to house and keep the animal species "entertained" so they live as naturally as possible.
Natural uavoidable extinctions are things we hve neither control over, nor means to return. However loss of species that represent nodes in a living web (plants or animals) based upon our overexploitation, pollution, or habitat loss can result in unknown consequences for us, and the gradual loss of the species should be a wake up call.I see no difference between "Game Farms " and "Zoos' as a means of keeping animal species.
If we dont go about capturing and holding species in various zoos or game farms around the world, we can be sure that we will lose the species forever.
Despite all the hullabaloo about genetic cloning and species ressurection, we need some host species upon which to derive the clones. We cant "bring em back from extinction without a host form. Like elephant, there were 13000 000 African elephant in the mid 1800's. Today there are only 500 000. Its reaching criticallitycritical levels and many uniquely diverse genomes gone from nature, are held in zoo specimens.