Well it keeps happening because the military acts like it knows on an institutional level how to shape someone who will fight tooth and nail and use every tool at their disposal (even if it doesn't exist yet and they have to invent the necessary tools themselves) and the rest of society worryingly falls in line about it. Militaries all throughout history have proven exhaustively that their very structure and institutional values primarily promote rule followers who are catastrophically ill-equipped to operate in an environment of rapidly changing rules and evolving tactics.

No, if the militaries of the world actually gave a shit about this good improvisational comedy/theater teachers would all be on the payroll of various different defense agencies and would frequently be retraining military personnel about how war actually works.

You know what is better than everyone having radios and being in constant contact that risks jamming or interception by Electronics Warfare units? Go watch a good live improv show, you will see.

Every large war is a forced remembering that the kinds of people who obsess over the aesthetics and planning of war are wasting time forgetting how one actually fights a war when push comes to shove.

The primary thing good improv teachers help you do is understand intimately the necessary power of acting on instinct the instant something disturbs the status quo to retain initiative while also recognizing being able to step back and let the situation organically resolve itself is winning and ultimately your job is to facilitate those conditions.