I’m a dumb idiot who needed Hurricanes Harvey, Irma, and Maria to hit in the same month to realize Kaijus in Pacific Rim were a metaphor for climate change and hurricanes and, like, the movie isn’t even subtle about it
there’s a very long tradition in monster movies (and kaiju eiga if you wanna be specific) of monsters as allegory for natural disasters, pollution and climate change. Godzilla vs Hedorah is a really good example where the enemy is literally sentient pollution, and pacific rim does the same thing it did in taking widesweeping environmental issues and linking it DIRECTLY to the appearance of these monsters, both with the above examples and newt’s dialogue after he drifts with the kaiju brain and points out that climate change and co2 emissions means we practically terraformed our planet for these aliens to come BACK and take over. Monster movies are a LOT of different things and can be very silly and absurd but they can also be built around very serious and specific messages about the condition of our planet, and in many ways messages about human impact on the environment has been built into modern monster movies since the very beginning (looking at the impact the original ‘godzilla’ had on pop culture and monster movies the world over)(its also worth noting that this probably extends into many other monster films and franchises from many other countries that i havent seen)
ALSO note how different cultures see human-caused radioactivity. In Japan, Godzilla (an enormous lizard/dinosaur awakened and fueled by nuclear testing) was an allegory for the destruction of hydrogen bombs. Meanwhile, in America, Peter Parker (a white scientist) gets bitten by a radioactive spider and turns into a superhero.
Sci-Fi has always been a mirror for humanity’s mistakes.