system
Given the following post, respond as if you're commenting on Reddit:
human
[kaiju movies] why are the militaries so stupid?

Whether it be bombing their own city, wasting time building giant mechs, or giving a nuke to creatures that feed off radiation, the military messes up a lot in these movies. Why?

Bonus points if you can figure out the three movies I’m referencing.
gpt
Modern militaries are extremely intelligent and make decisions based off of real-world facts that they've carefully gathered and tested over the course of decades or centuries.  Faced with a single giant creature the answer is obvious: overwhelming and direct force to stop it as quickly as possible.  A single downtown core can be sacrificed if it means protecting the larger metro area and wider economy.

* The first step is always small arms and tank rounds.  HEAT and depleted uranium penetration rounds should cause massive damage to anything living. Period.  Military generals not only *know* that, but base all of their core decisions off it.
* Ground penetration bombs and directed munitions can level an entire city block if necessary, and are the next obvious escalation of power.
* Given that those don't work, you now need something big enough to mount something more powerful but still mobile enough to quickly engage the enemy (which is where mechs come in)
* Finally, nukes are horrifically devastating.  Especially the modern ones.  Launching one at an enemy is a last desperate act to make sure NOTHING survives at ground zero.  Every test that modern military generals have seen says that a modern nuke will destroy whatever it needs to.

Sadly, what military leadership doesn't understand and refuses to grasp (rightfully so, given how they got into their chair in the first place) is that Kaiju **don't follow laws of physics**.  If you put a sack of flesh, muscle, and bone the size of a Kaiju leg in a testing field it couldn't stand up on it's own, let alone protect against directed fire of an M1 Abrams division.  The fact that it can is baffling, and leads to more and more desperate plays that ignore moment-to-moment learning that they might gain from individual engagements.

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If the stories track long enough, the military either collapses from these failures, or learns how to fight asymmetrically against the physics-defying might of a kaiju.  It just takes them a while to abandon the beliefs that got them to where they are now.