The reason people probably have strong convictions about right or wrong is most likely because of nature, not despite it. Groups that had this genetic trait built tribes, societies that had greater success in the long term.
In the short term, individuals, or even groups of individuals, can be successful by acting amorally, but this comes as a cost to their group's long term success--the cancer analogy.
Right now there is limited competition between groups in the world. Most of what we should be competing against is the coming extinction event when something else out there gets a whiff of all the artificial elctromagnetic radiation. Probably the reason we hear so little in the cosmos is because it is not a very competitive strategy.