According to Osho, a single method would only suit a small minority; seekers have diverse temperaments—mind-leaning or heart-leaning, effortful or surrendered—so many doors are needed. Past religions erred by absolutizing one path, excluding others and breeding refutations. His approach offers multiple sadhanas within one space so each individual can find a fitting way and the whole can be included.
People are different, so they need different kinds of practice; one-size-fits-all leaves many out.