From an economic standpoint I could understand why you would want to log the trees that are a fire danger, damaged by insects, or host to Phelinus weirii.
I still would like to hear from you just how long this type of logging is expected to take place. How many cycles can we realistically expect out of this practice and how certain is it that future generations will have the mind to take care of the forests so that logging can keep people employed and local/regional economies moving along?

However, I would like to present my knowledge of how the forest works. I suspect that you already know some if not much of this, but I just feel like putting this out there for all who care to read what I have to say.

A healthy forest uninfluenced by logging is subject to population control by nature. The three things that you mentioned, fire, insects, fungus are all one of the many ways that a tree can die. The death of trees is not a bad thing, because they can recycle nutrients back into the forest via various routes.
While generally devestating, fires create & destroy. Burnt areas tend to favor Douglas fir due to their affinity for open sunlit areas. This we know to be early seral forest.
Insects play an important role in the food web. Those that kill trees directly or indirectly recruit both snags and coarse woody detritus(CWD). Snags provide roosting habitat for birds and food for boring insects which in turn provide food for woodpeckers. Trees that litter the forest floor are processed by insects, microorganisms, fungi, small mammals, etc. This is in essence the food chain which results in the conversion of dead wood into the duff that comprises much of the forest soil.
The various fungi that are associated with root rot often cause the tree to fall to the forest floor. As stated above, the trees become incorporated into the forest floor and return nutrients to the soil. Additionally, under the right conditions some of these trees become nurse logs.

I'll stop here for now.