Originally posted by Bentley
Nop. Tsunade has a weak*ss will, she would be koed by royal haki. Power and will power don't always go hand to hand, if WB koes 10 powerful ninjas doing exactly nothing, Konoha's chances are going to be much slimmer from the get to go.
The strong ninja we've seen all seem pretty good in the willpower to me. Once Tsunade regained herself I can't even see her being bothered by it.
While it's true strength and willpower don't directly correspond, it's going to be a rare fluke ninja indeed who can ensure the grueling trials required to make it up the ranks and not develop a strong will. Being able to keep your cool in a tough situation is a key ninja skill.
We're often talking veterans of hundreds, and in some cases over a thousand, of battles, and also undaunted by facing crazy powerful enemies like Pain and Hanzo, been exposed to enemy genjutsu on many occasions, see comrades die, and so on.
I could see it in the case of a kekkei genkai user or other with rare talent, or a support ninja, so even some of the useful specialists might go down, but probably not any of the strongest ones like Jonin or Root.
And if the battle foes on long enough, those hit by haki may be able to rejoin the fray, especially with outside assistance.