- Practice isn't the same thing as actual events. Being good at practice is more likely to diverge from being good at crisis response as actual crises become rare, because the criterion of matching what would happen in a crisis gets much less important. Thus, peacetime militaries often need radical overhauling before they can really get much accomplished when war breaks out. (Also consider - we have a lot of people who are really interested in how medieval combat (whether in a battle line or a duel) worked, what effective use of weapons looked like, and so on. But for all the discussion, we don't know, and we can't know unless we actually stage regular battles-to-the-death with period tooling. One form of combat practice, however, has been preserved as European fencing. How closely does it correspond? Again, we don't know, but consensus is "not well".)
- The automation's cost savings are free -- in fact, in this example, they have a large negative cost, cutting catastrophes by 40%. Keeping everyone in shape to handle crises they're likely to never actually see is, arguably, an enormous waste of money. (In addition to actually being impossible much of the time, as in my first bullet point.)