Wild animals actually need to worry about their immediate survival. The major concerns of your average grazing couch bison involve worrying about someone hurting their fee-fees over the internet. We've reached the point where Darwin's theory of natural selection no longer applies, we're keeping the obese, the sick and the weak alive long enough to breed and actually damaging ourselves as a species.  We are now devolving, not evolving as a species into fat, weak pathetic, overly emotional blobs.