I'm not sure how Pike leaving damned the Talosions to extinction though.
It was the human race's "unsuitability" for captivity that they said condemned them to extinction. Humans had been their last hope because no other species had shown such "adaptability."
Yeah, but I don't know how humans would save Talosians?
I got the impression that Vina and Pike would be an Adam and Eve, but they'd only breed humans so that wouldn't help the Talosian race. Perhaps they wanted to harvest human DNA?
Or did they just mean that humans would be able to survive on the barren planet and find a way to help the Talosians?