I get the feeling that it was very intentional that depose was written in the casing of the cartridge that was fired.

Depose can mean to "remove from office suddenly and forcefully" like when a government is over thrown, the leader is deposed.

In this context, the CEO was deposed by no longer being able to fulfill his role as CEO due to a severe and acute case of death.

The fact that "delay, deny, depose" is the general policy for insurance companies is the motivation for using that specific term over others. "Delay, deny and depose me? I'll depose you." Kind of thing.

I think it makes a very loud and very clear message.