I get the feeling Kaido is holding back against Yamato similar to Garp holding back against Luffy or Chinjao against Sai, perhaps even Judge against Sanji to some degree or Whitebeard against Teach. They might not be doing it willingly but their resolve is lacking/waivering where as the young bloods are full of commitment.
I can definitely see something like Big Mom aim an attack against Luffy after he has defeated Kaido only for Yamato to jump in front of the blast and then Kaido in his turn jump infront of Yamato
I can definitely see something like Big Mom aim an attack against Luffy after he has defeated Kaido only for Yamato to jump in front of the blast and then Kaido in his turn jump infront of Yamato