Neither will the average "he" either, of course.
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Example: there are plenty of trades, units or disciplines in the military who get lost in the worst case (usually also the most ally) potential of the job, and so focus their kit, recruitment, training and chat on that. This sounds, to a degree, sensible: except that it often means that the normal running elements of the job, which they actually do day in and out, and which may be the most important part, get ignored. The result is that they are great at stuff they never do, but less than spectacular at their core job. The classic example is recce type units who spend all their training time on contact drills, and little to none on recce skills. There are others.
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Fitness is like that. Training to the ultra worst case scenario all the time just breaks people. Tailoring it to reality is a sensible approach.