system
Given the following post, respond as if you're commenting on Reddit:
human
[Godzilla] What makes Godzilla/other Kaiju skin so resistant to modern weapons?

We've got high Penetrating rounds, things capable of going through tanks, bunker busters, giant canons, and everything in between. And in many of these movies it's been a recurring theme to run into these monsters, so wouldn't research and strides be made to make reasonable weapons that could penetrate or do some damage? Why do none of our weapons ever seem to work in these movies (I mean I get why they wont work cause I want to enjoy the movie)?

And if there was a weapon that you would think worked what would it be?
gpt
They're really really tough.

I know it's not the most satisfying answer but, like, why is a tank so resistant to medieval weapons? You could give a lot of complex answers based around material sciences and the physics of impacts and so forth, but they'd basically boil down to "the tank is really really tough".

Same here. Kaiju are just very, very tough. Like the knights fighting a tank, we haven't made something able to harm it yet.