Earlier quoted context omitted.
> Do you think it's because of whatever brain damage they may have encountered, or because they could not find meaning in their civilian lives? Why not both? One of the key challenges with taking care of humans is that we rarely have the luxury of having only a single problem at a time.
Because if we are to address this problem we have to identify the primary cause.
If I break my leg and have COVID, I'm not going to be better until both of those problems are fixed and neither has any bearing on the other. There is no primary cause. There may be different levels of urgency, but some problems in the real world are just intrinsically messy and complex.