The two examples that your wife refers to - refusal to perform military duty and regular involvement in field service - are interesting because they require similar responses by the baptized Jehovah's Witness.
Both examples require action based on beliefs imbedded in WT doctrine. The belief system imposes these rules upon the individual. The individual risks discomfort, social stigma, persecution, imprisonment and even death. The risks are glorified through constant reinforcement in the WT publications and talks.
Your wife (like most other JW's) holds the examples of persons who sacrificed their own lives (figuratively or actually) in this way as prime examples of faith.
I suspect that she gets emotional just thinking about these examples. Perhaps she is trying to reduce her cognitive dissonance right now.
Maybe she is questioning how someone could risk their own life for a belief system / doctrine that continues to change...
Using facts and figures may not help right now. It's her feelings and emotions that are churning.
ginger