I can imagine which kind of gun enthusiasts will form militias then, and what kind of values they will enforce... Certainly not equality and the rule of law. Many would probably hunt or terrorize immigrants and LGBT+ folks for leisure, for example.
Sure, police culture and accountability are broken in many places (especially in the US), but just getting rid of them while leaving a power vacuum for any nut jobs with power fantasies to fill, with literally 0 accountability, would be even more of an absolute nightmare for minorities.
The climate impact of the poorest is nothing compared to the pollution of rich countries anyways and the same is true for factory farming. The money will likely be used for much more environmentally destructive things now instead. There's nothing positive in this from any progressive perspective.