Cause everybody in the series acknowledges that fact from big players! Yet fandom refuse to accept it to push their agenda.
Let's put aside the world strongest man title, and look for other stuff:
- WB was also called "strongest pirate", which basically include Kaido since he's a pirate.
- WB was set on a pedestal from Big Mom herself separating him with "I would have defeated Kaido, Red Hair and EVEN Whitebeard"...
- Kong tells Sengoku that many legendary pirates are still on the seas, and Sengoku replies "WB was the best of them" so even at the time of sickness, he was the best of them!
- When Vice Admiral Momonga was reported by someone that Red Hair vs Kaido is happening, he said they should focus on WB pirates cause they are the "mightiest pirate crew in the world"
- When Ace told Shanks he'll beat the strongest man to prove he's worthy... Shanks immediately said "you mean Whitebeard"
- When Mihawk sent his slash to WB, he stated he wanted to measure the distance between that man and the rest of us... and I consider Mihawk = Shanks
- When Doffy said WB took the reign for 20 years and stood before PK position not taking it by his will, proves his superiority
- When Garp said "it's too late, we have angered the KING of the seas"
- The small brief clash between Shanks and WB, Marco commented "Red hair is NOT STUPID ENOUGH to pick a fight and anger pops" meaning, he knows the superiority is with WB, and he knows Shanks is trying to get a point with WB and not fight him, yet still shows WB > a fellow Yonko even with tubes in his body
Lastly, I just wanna say that, when people bring the topic of "Yonko > Admirals" they mainly use Whitebeard (despite their claim of him old/sick weaker Yonko than others) so basically, despite the fact we have MORE panels with Big Mom thus far, despite the fact that Kaido has almost equal Panels/screentime thus far
People STILL are clinging to Whitebeard glory to advertise for other Yonko!
Why can't the "Yonko > Admiral" community use Big Mom in arguments who has been in TWO arcs?
Oh, and how about Kaido having PTSD from a crewmember on WB crew???
The "Yonko > Admirals" community keep clinging on Whitebeard glory!
When they bring their argument, they always depend on whitebeard feats, and then they bring the "old sick" when in reality even at his sickness, he would wipe the floor with the yonko, and what happened with Akainu, could be even worse for Big Meme or Kaido or Shanks!
Again, I repeat, BM and Kaido had MORE screen time, and they are in post-timeskip when Oda explained Haki better, and he showcases it more, and people STILL are hiding behind WB feats!