Qin Wentian felt like his head was anointed with the purest cream after he heard the white-robed young man's words. At this moment, he understood many questions which puzzled him before.
Jian Junlai had the title of Sword Monarch but this wasn't because he was proficient in sword arts. Rather, the sword was his dao. As for Heaven's Son Qin Dangtian, when he fought, he was surrounded by ancient characters which contained different types of daos. He acted as the intermediary to tap on the power of the different daos.
Also, there were a multitude of innate techniques in the world. In the hands of different cultivators, these techniques would be transformed differently in accordance to their dao because of the different comprehensions each cultivator have. They were only borrowing innate techniques and secret arts as a bridge to display the power of the great dao.