Precisely what rules, and what is your grounds for such a... level of acrimony?
The problem is that if you're going to practice doing something, and you practice doing it with one hand tied behind your back... You don't learn anything about how you'd perform or behave in the realistic "both hands available" scenario. And I don't know if you've ever done any kind of sport fighting (a bit of fencing, in my case) but you perform
very very differently under an artificial handicap than you do without the artificial handicap. Leaving out a critical part of your defense scheme without first
including that part in other practice exercises will result in an exercise that is unrealistic and unbalanced in ways that reduce the amount you can learn.
It's like... if you want to practice operating a spiderweb, you can't just leave out the spider. You won't learn anything useful from the practice other than "gee, it's very important to have a spider sitting on your spiderweb to tie up any bugs it catches, otherwise the bugs get loose." The whole
point of the spiderweb is to support the spider, after all. Sure, someone could argue "well, it's a better test to see how the spiderweb performs in isolation." But even if you learn that, it doesn't tell you very much that you can use.
Likewise, you could force soldiers to practice fighting with no ammunition- but all you'd learn is "guns work a lot better when you remember to pack the bullets." You could force surgeons to practice operating on patients in bad lighting- but all you'd learn is "light helps people see better." You could
set up a tactical exercise where one of your ships is obsolete and has its main reactor shut down, but you're going to be hella lucky to learn anything*.
Forcing people to fight under artificial circumstances that cripple some of the cornerstones of their fighting ability may sound like good training, but it's actually not. Not unless they're already experienced and practiced in fighting
with those cornerstones in place and you're trying to give them some advanced courses on how to fight in unlikely bad-luck situations.
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*(In this case, they only learned anything because Riker and Worf are awesome and because Wesley has the most stupidly dangerous science fair projects in the galaxy, in this case including
actual antimatter. And not "drunk Gaeni blows up the building" pittance quantities, either. GEEZ.)