Why limit that to survivability? If you like to do something (say, eating sugar and reproducing), do stop doing it right before it kills you, or when you believ

Why limit that to survivability? If you like to do something (say, eating sugar and reproducing), do stop doing it right before it kills you, or when you believe it's reasonable to stop because this particular things is not the only thing you care about? We can perfectly stop destroying our habitat because it would kill us and because it makes no sense to do so. We're just addicted to things that kills us and we should get this addiction under control simply because it's an addiction (compulsive engagement in rewarding stimuli despite adverse consequences). Addictions are bad for you, even when they don't kill you.