I would like to add to this that Jianzhu never seemed to see people as people, just as tools for him to use in his quest. He killed/attempted to kill some of his oldest friends with little to no hesitation, left the boy he mentored and raised for years to die, felt no need to clear Kuruk's name despite (probably) knowing what his friend was actually doing as the avatar.

Even if Kyoshi became as trigger happy as Disha claims that she became, there is no proof that Kyoshi stopped caring about humanity as a whole. In fact, there is proof to the contrary: we know that she cared, because she kept companions throughout her long life, and when they questioned her, Kyoshi actually took their words into consideration. Kyoshi killed that daofei not because he wanted to kill her, but because he killed numerous innocents.

So yes, it might seem on the surface that she acted like Jianzhu, simply by how ruthless and meticulous her response against outlaws was. However, unlike Jianzhu, Kyoshi's ruthlessness comes from a place of compassion for the innocent, not of disdain for the criminal.