I think the problem may be that you've made a caricature out of the arguments.
Yeah, I'd go with caricature. But hey, it's going both ways, so it's only fair, right? Even if it's not productive?
I don't agree that is what I did at all. I didn't distort the arguments for both of those positions. I represented them in their most provocative light, intentionally, but I didn't distort them at all. I just wanted to distill the noise and get the most pure signal out of those two positions that I could.
The anti-fear effect vs Will causing a hardened warrior to run away.
The anti-goad/ruse effect vs Will causing (i) another warrior (or more) to engage the target or causing (ii) a ranged character (be it bowman or wizard) to engage the target. When I say "engage", I mean "move into melee and attempt to attack".
I thought both of those pretty well represented the most ardent of the two positions. There is no distortion there. They are two sides of the same coin so I'm just wondering how its possible to hold both positions simultaneously.
My personal take is that I find it considerably nonsensical for a hardened, veteran warrior who consistently faces certain death and moves forward in the face of it to randomly (i) run for his life in fear and (ii) expose his comrades to peril. Hardened warriors jump on grenades so their buddies don't die. They don't run the opposite direction when the chips are down. Might they suffer some kind of shaken effect? Perhaps. But that is about the extent of it.
My personal take is that I find it considerably nonsensical for a wizard or a bowman to engage a hardened warrior in battle regalia in melee on the strength of a challenge or a goad...they're not going to fight the battle on his terms, that doesn't make sense. However, might they move forward a few paces to fire a point-blank shot into his head, execution-style, to make sure ("How do you shoot the devil in the back...what if you miss?") that their enemy is good and dead? I can buy that.
And beyond that, I can absolutely, 100 % buy hardened warrior challenging hardened warrior to hand-to-hand combat and the siren-call of the ego getting the better of the opponent...there is literally a legion of these examples in the animal kingdom (human animals included).
I can buy that a lot more than I can buy a hardened warrior, who would jump on a grenade to save his buddies, running for his life in fear and exposing his comrades to peril. However, all of that being said...I'm of a mind that I want my fiction to be as diverse as possible. As such, I want all of the above possibilities to be available in the rendering of the conflict and I want PC build resources (to make you more willful or made of sterner stuff) to play a role in the outcome...and I want dice or other fortunes to play a role in the outcome...and I want the genre preferences at the table and the creativity of the group in question to have a go at skinning the outcomes to their liking. As such, we have the possibility of hardened warriors running for their lives, warriors being challenged and accepting, and bowman and wizards being tricked into taking a few steps forward for the chance at execution-like precision "just to be sure".