Stop daydreaming, it is explicitly stated that Shanks who is often stated to be weaker than Kaidou in canonical clashed with Kaidou who according to the vivre card only had King on his side.
Kaidou isn't shy about taking on Shanks + all his military might with just King by his side, and you think he's being negated by Haki wifi? Shanks is a fearful rat who only appeared in Wano after Kaidou's downfall and is only trying to get One Piece now that Kaidou and Big Mom are gone, the way he's getting Road if he's going to defeat Kid is pathetic.
The guy only decides to put his plans into action when the two giants have fallen. LMAO
Narratively says a lot.
Kaidou is going around saying that no one can beat him and that's after he got into a fight with Shanks WHILE shanks doesn't dare say the same for himself.
As much as I like Shanks you guys with that exaggerated handjob drives me crazy, Kaidou's presence is beyond Shanks' Haki Wifi.
Let's not pretend that Shanks' presence has been intimidating people like Kaidou's presence does.