Because the rich have spent 2 centuries entrenching themselves in power, and literally everyone else won’t do a thing about it.
We’re all so apathetic that the impending collapse of our ecosystem is viewed with a shrug. When it should be met with torches and pitchforks in the street, and Madame Guillotine for the rich and powerful.
Nobody gives a shit because they’re all waiting for someone else to do something.