Powers & Abilities I want to point out that permanent advanced haki armor burns stamina

[MonsterKaido]

Kaido has his scales just in hybrid form, bege never explained anything he just said body hard will use trick to hurt

Ngl bro you use too much head canon in any topic being debated.

 

[bzxw27]

Ngl bro you use too much head canon in any topic being debated.

Dude we literally can't see any scales and we don't know anything about big mom's dura apart from that she is like an iron balloon

 

[Erkan12]

Kaido is not constantly using Haki like BM, on rooftop he was using enough Haki to stop Law's teleportation. Otherwise he relies on DF defense, we see Kaido can defend better with Ad.CoC vs Luffy later.

BM is a different case, her superior stamina could be related to her hunger, she needs to eat a lot similar to Luffy, so she can use Haki most of the time even when she isn't fighting anyone.

Thats why when she can't eat she weakens and turns skinny immediately.