Sustaina-blah Architecture

Does Architecture and those who work within it, really need to be taught about 'sustainability'; is it not inherently obvious for a sector whose disciples boast a minimum 9 years in education, have a balanced skill set with art and science both freely explored to manifest in creations that offer shelter. Surely these intellectual migrants ebb and flow with energy spurting from cerebral relief valves, understanding the holistic nature of security that plagues the human psyche. fear is an emotion we involved in architecture should alleviate when driving a project towards fruition. So why oh why do we need to have 'sustainability' introduced into a work schedule when it is inherent in the work we do?