Same chapter Zoro says if the fight drags on he will forfeit his life
The sword kicked his ass, but you will always bring up the mink piss. Zoro emphasised the sword would have killed him
Not to mention King unexplicably turned off flame mode.
When Sanji got the hang of his power and speed he blitzed Queen to Oblivion ,
Zoro beat King due to PIS, he would’ve died otherwise