In the world of One Piece, physical skills, domineering, and demonic fruits are all ways to increase their strength. The amount of strength increased depends on the cultivation and development of the strong people themselves. Domineering has a high-level use method, the demon fruit has a higher realm of awakening, and there is no so-called strength or weakness in the two ways, only the strength and weakness between the users.
However, in the 1047 episode of the manga, Kaido said that he could not dominate the world by his ability alone, and only domineering was above everything.
The meaning of Kaido's words was obviously to push the domineering spirit to the throne, and the demon fruit ability was subservient. Kaido himself is both a Demon Fruit Ability and a Three-Color Domineering User, so why would he hold on to his domineering spirit? As for the reason, Kaido has also explained in the comic that it is "One Piece" Gol Berger. D. Roger.
Roger is not a Demon Fruit Ability, but a powerful swordsman who can use the Overlord Color to wind, and is a powerful group. Roger was the only one in hundreds of years who conquered the Great Passage to the Ultimate Island, hence the name "One Piece".
For hundreds of years, so many powerful Demon Fruit abilities have not been able to dominate the Great Passage, and Roger, a non-ability person, has become One Piece, is this not because he did not develop Demon Fruit, but studied domineering? That's probably what Kaido thought.
In addition to Roger, there is actually a powerful domineering user, let Kaido hold the domineering, this person is redhead. Before the War on top, Kaido tried to attack the Whitebeard Pirates, but was stopped by the redhead. What a brutal person Kaido was, and he actually gave up his plan, which showed how domineering the redhead of the incapacitated person was.
It is precisely because Kaido has seen the strength of domineering that he is so domineering.