One of the many reasons why we are here on Earth is to learn. Our experience of life can be likened to a kindergarten for souls where we naturally learn valuable lessons through the consequences of our free will. The main idea is to advance life forward as a whole from knowledge gained primarily through our own personal experiences.
Upon gaining a certain level of awareness, the wise and the fortunate realize that there is a wealth of information which has already been discovered and validated by geniuses of the past. It makes no sense to them to “re-invent the wheel” per say.