Mankind did not evolve by left brain limitation, so today we stare with awe to ancient buildings and societies. Like to tell you, that most of these builders have used the whole brain in synchronization. Combined power to solve complex puzzles and this is base to do shaman work, to see what others cannot see, experience what is hidden for them. See solutions from a different angle to create different results.
Not to forget the divine antenna that sits on the right brain, so using the left side alone is an active disconnection.
Thanks to Infinite Waters for his pretty explanation.