Even in this age of “unique” individuals, the problems noted back as far as 1500 BC (or earlier) continue to plague us as a society. Blind following necessitates the surrender of reason, and thus negates our humanity, as we try to fit into our surroundings.
Traditional Wisdom includes short stories, sayings, and even jokes, produced as easy to remember/easy to digest bits by various cultures, in order to communicate crucial and complicated ideas to the general population. For all their simplicity, they can serve as an important source of critical thought, and even answer deep philosophical questions, without the need for specialized knowledge.
A structured system of how knowledge works helps us use it better, and recognize where we may have problems and weaknesses. Understanding the limits of knowledge explains why knowledge alone is not enough to make us act a certain way. (How many med-school students smoke?)