Should we bring extinct creatures back to life?

It is not a question of if we can bring extinct animals (or plants, for the matter of this debate) back, but rather whether we should. Yes, scientists have discovered new technologies that enable them to bring back extinct creatures, which is called de-extinction (the same way cloning works). Proponents say that we should do it because we can, and we should do it because we have an obligation to do it, to right some of the enormous wrong we have done by driving these co-tenants of the Earth off the planet. Basically, they argue we can rectify our mistake of intentionally killing off so many of nature's species because science has evolved to this extent. Opponents argue we don't yet have any clear notion of how to reintroduce them into natural ecosystems. For example, the wooly mammoth's home environment no longer exists, so even if we bring back these animals, they won't have anywhere to go. They also reason that there are plenty of living species that are critically endangered. Why waste resources trying to resurrect the dead when we can use them to save the sick? In short, why try to redress the past when there are so many problems in the present? Plus, they also say that this is just acting like a "god", by bringing back the dead. Both sides of the debate are quite strong on their claims, so I urge you to state your opinion on whether we should or shouldn't bring back extinct creatures.