Im struggling to find a scenario where i'd rather lose out on damage over two turns in exchange for the opponent losing their item. Either you wouldve been KO'd in the meantime, or they were already in KO range. If this was Bisharp i could see your point, due to its potential role as utility, striking when the iron is hot and depriving the opponent of tools to use later, but this isnt bisharp. This is Kingambit, whose sole role is to clean house. It comes in at the end, and turns the game around, simple as. You dont turn games from 4-0 to 0-1 with utility, but with raw fucking power, and Kowtow Cleave does more over knock off in the end.