If you think you can convince people with Ad Hominem fallacies then you shouldn't take part in this debate. I tend to interpret the clarification in the FAQ as an exclusion to mortal wounds. I think what @EnixLHQ tried to do was to apply a logical parent-child relationship: Deathless Spirits inherits its rules by being a child of the Ward ability type, which acts as parent. KC's Empowering Excruciation is its grandchild in this case. Therefore mentioning mortal wounds would be redundant, because there's a logical precedence in the relationship.
That was correct before, but I think that's obsolete now. The FAQ does not refer to Deathless Spirits, which "specifically says it negates mortal wounds" but to cases like Empowering Excruciation, which – although being an influence to Deathless Spirits – is an ability by itself and literally does not include mortal wounds.