We all benefit from work that is meaningful and that does no harm. And what IS its precipitous relationship with war, global health problems, social inequality. The Jews practiced what you suggest and they got precipitated with extreme prejudice.
Nice guys finish last and nice countries are no longer around.
Well, you won't know unless you care to know. Sensitivity to our potentially damaging effect on others is the flipside of sensitivity to out potentially beneficial effect on others. Progress toward nonviolent coexistence requires a double-edged analysis that becomes more clearly informed and refined as we evolve beyond numbness to harm and indifference to our healing potentialities. Justification for harm is actually a symptom of the pervasiveness of denial on all levels of our being. The light at the end of the tunnel has been eclipsed by ego expediency.