My brain is telling me that « not being proud » mean that it is not because Luffy was happy to win that it is the victory it is the most proud of.
You can be happy to win without being proud of the way you win. That is called ambivalency.
« It is not written by Oda so it is not canon » - By the same people who :
1/ Will use anything that support their headcanon even if it is not written by Oda himself
2/ Will not take into consideration what Oda himself wrote anyway, if it goes against their headcanons.
So stop wasting...
Trying to be stronger in a field mean that you want the tthe strongest in said field.
For example : do you ever heard Kevin Durant said that he want to be the GOAT and surpass Michael Jordan? No you don’t. But do you think that when he is training he is not wishing of becoming the GOAT?
Because Oda has the naïveté to thought that his readers would be intelligent enough to understand that every swordsman is aiming to be the WSS because every swordsman is aiming to be the best in their field. Like every martial artist is aiming to be the best in their respective martial art.
I think people know but I also think people should stop with « Oda is not doing it by himself therefore we should not take it seriously ».
Because Oda having assistants, he is not the one doing everything in the manga either. He gives his assistant directive so are we going to stop considering...
Maybe for Kaido but the blue spark is clearly haki.
To be clear :
-in the color version when Dofla use his awakening the tip of the string are purple.
-When Sai bear Lao G the impact of the kick create blue spark
For me cutting fire and cutting steel is like the difference between putting haki on your arm and putting haki on a weapon.
Or like putting haki on your arm and putting haki on all of your body at the same time.
But I might be wrong.