Mind you, Oda easily could’ve given Shiki moments to highlight his strength in the flashback, but he deliberately chose not to multiple times lol
The narrator flipping this moment after God Valley and highlighting Big Mom, Kaido, and Whitebeard as the pinnacle of pirates absolutely retcons this era being “Shiki’s” lol, this also means he wasn’t even the missing fourth Yonko everyone thought about, it was Roger lol