... none of which detracts from my point, though?
Yes, okay, all these things exist, I never claimed that Buddhism claimed they didn't. I claimed that Buddhism believes the world can't be changed.
In fact, you can even read that out of what you quoted, though it's not as explicit there as elsewhere. Note that the entire passage is focused on your mind and your beliefs, not at all about the external effects of those beliefs, not at all about your practical ability to effect change. Right view, right effort, right mindfulness -- not right consequences.
Instead, though, I'll just point at, yannow, the four Noble Truths themselves. Which start with "All life is suffering, and the source of all suffering is desire."
Or perhaps I should point at the very definition of dukkha, which claims that all the world we see is transient and impermanent (and therefore implicitly cannot be made permanent, cannot be changed fundamentally in a way that won't just get undone later)?
Or perhaps I should point at the fundamental premise, that the only solution to samsara is nirvana?
I can go on if you like. You're missing my point entirely.