Ok, so whats your point? Is Hypothermia not important?
(deep breath)

To repeat, I do not regard hypothermia as unimportant. To repeat, my point is that
almost no "survival" literature discusses how to avoid the most significant causes of wilderness death, including the latest and greatest -- Le Grande Cody.
Do you have a wilderness plan on how to not fall down? What are you talking about?
I need not be an expert on radios to point out that a radio that I bought does not make any sound. However, I have given some thought to the topic.
One might address the need for footwear with good traction. This is contrary to the belief of some that high-traction soles cause unacceptable environmental damage.
Planning, using topo maps, could reduce risks.
Many sources are still calling on folks to back their backpacks with a very high center of gravity. Leaving aside the issue of whether that makes any sense with most of the load on the waistbelt, a lower center of gravity reduces the risk of loss of balance.
Train on use of safety ropes.
Emphasizing the risk of falls (and heart attacks and drowning) might encourage folks to minimize exposure to the risk. If hypothermia is so far and away the geratest killer than no other risk is seriously discussed, why worry about any risk more dangerous than hypothermia?
Heart attack? Physicals. Stay in shape. Aspirin in the first-aid kit. Realistic expectations.
Drowning? Learn to swim. Loosening pack belt before crossing. Field test for water temp before that "cooling dip." Avoid diving. Testing depth and footing ahead of progress. Technique for surviving passage of rapids if carried away. Training on danger of contact hypothermia. Overloading of watercraft. Safety lines. The force of moving water. Planning to reduce risks.
That's only a start. Y'all can come up with more.