Too Long; Didn't Read
People ask if there is enough room in the marketplace for their idea/product/service. Creators are often scared everything has already been thought of, every product invented, every service offered, every song sung, every story told. By definition, people are terrible at knowing what they don't, and we are particularly bad at grasping large numbers and complex systems. We're human and ill-equipped for understanding the scale of the systems we move through, which might be the most important thing to actually, uh, know.