You don't have any communication between the Israelis and the Iranians. You have all sorts of local triggers for conflict. Having countries act on a hair trigger - where they can't afford to be second to strike - the potential for a miscalculation or a nuclear war through inadvertence is simply too high.
Nor is it the least advantage to health accruing from such a way of life that it expose those who follow it to fewer temptations to vice than persons who live in crowded society.