"are you refering to the same nature that has many of its organisms fight, starve, die off, suffer, and/or live in constant fear?"
Yes the same nature that also has animals outside, grazing, living with their families, walking where they please. ..
Animals do not live in constant fear. Their stressors are only things that are immediate threats, the majority do not have the brains to comprehend long term threats. Everything is in the immediate to them. If you are argueing that nature is just as cruel as keeping them in cages their entire life, pumping them full of hormones, tearing them from their mothers, and then systematically slaughtering millions of them then you my friend are a fool.