If you develop all the right attributes, will decision making become easy?

Not necessarily. There is one other ingredient, Courage.

Have the courage of your knowledge and experience. If you have formed a conclusion from the facts and if you know your judgment is sound, act on it even though others may hesitate or differ. You are neither right nor wrong because the crowd disagrees with you. You are right because your data and reasoning are right, Similarly, in the world of securities, courage becomes the supreme virtue after adequate knowledge and a tested judgment are at hand.

Benjamin Graham from the Intelligent Investor