User blog comment:D.Dragon123/Why Haoshoku haki is useless./@comment-1595565-20130114185345

As shown on Fishman Island, it can be useful when dealing with large groups of subordinates. It has more to do with willpower than strength, and a skilled user can even decide which people i an area get to stay conscious. Since Luffy never used it on PH (that I recall), for all we know Caesar is susceptible to it, or maybe Buffalo and Baby 5 are. If anything right now, it shows a character's potential. That is, if they can learn Haoshoku Haki, the hardest and rarest of the three types, what else are they capable of? It'll have its uses, just not against major opponents. To have it be effective against a Yonko or Shichibukai is just anticlimactic and boring. And nobody wants that.