You really never make any sense, do you

There is nothing to learn. SANJI IS ASS AT USING OBSERVATION HAKI TO SENSE A PERSONS INTENT WHICH WAS PROVEN WITH THE SITUATION WITH BLACK MARIA AND HER FEMALE SUBORDINATES.
Katakuri with future sight is also ASS at sensing a person's intent. DUDE GOUGHT LUFFY FOR 11 HOURS AND DID NOT REALIZE THAT LUFFY WAS GETTING SLOPPY BECAUSE LUFFY WAS ALSO BEING ATTACKED BY KATAKURIS YOUNGEST SISTER LOL.
HELL THE FACT THAT IN THE WHOLE CAKE ESCAPE FOR THE VINSMOKE COVER PAGE KATAKURI WAS CAUGHT BY CEASAR CLOWNS GAS AND IS HAVING A HIGH DIFF FIGHT WITH OVEN ( is using awakening and haki against over and they are hitting each other simultaneously in the face) makes it obvious again that katakuri is also extremely ASS at sensing intent with observation haki.
The only persons shown to be top tier observation haki specialists when it pertains to sensing intent are: Fujittora,, Luffy, zoro, koby