I've long felt that the Haruchai refusal of lore and weaponry (yes, Cail, it is infringed upon a few times; those are exceptions that prove the rule, perhaps) is at core about means and ends. Early in LFB Bannor says (something like; I can't find the exact quote right now) "Any weapon may turn on the hand that wields it." Any means that was separable from themselves could be turned against their purpose, so they forswore the use of all such.Fist and Faith wrote:The way they limit themselves in this way is frustrating at times. But, ultimately (at the end of the day? ), I view such things as a package deal. In Chariots of Fire, Eric Liddell, among the greatest runners in the world, would not race in the Olympic qualifier because it was being held on Sunday. His belief is that the sabbath is God's day. Various powerful people, including the Prince of Wales, tried to convince him that this was sufficiently important to deny his beliefs. But he would not back down.Cail wrote: As to the exact nature of the Vow, I don't know. The Haruchai are incredibly passionate, and it would seem that they should go to any length to keep the Lords alive. However, their credo "Fist and Faith", would seem to run contrary to the Vow. If Tuvor could have done his job better with a sword, should he have? Who knows. This is part of the enigma of the Bloodguard.
The Haruchai passion, honor, extravagence, and Fist and Faith mindset, all go together. Change one, and the others will likely change too. So if they used weapons, they might also be a bunch of lying s.o.b.'s. If Hesse wasn't crazy enough to be sent to an asylum, would he have been the writer he was?
Unfortunately, this was not as seamless a protection as expected; Foul finds a way to separate them even from themselves.