100% right, ecosystems would be permanently destroyed.

If they were to bring back the Dodo bird it would peck our eyes out, since that would be how they eat fruit, and all the other animals would stomp, stab, or spear us to death on purpose or by accident. And we cant even provide for our whole population, let alone other animals. And if we lose the species we currently have we will lose things we are able to do and life cycles would be ruined, food chains will run dry, and the next generation will only be able to study skeletons, so this might help in the future but it doesn't help now.

This isn't useful in some places of the world since it is really hot so it is kinda a waste until it gets improved. Hopefully we don't give it artificial intelligence.