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While it's not exactly the traditional Randian objectivism you're alluding to, effective altruism adds an extra step: it ostensibly helps people. But, ultimately, it's a distinction without difference: no one escapes the dialectic. Individuals, especially ones cloistered off from the world, are not good arbiters of what will make the world better, or of understanding the higher-order effects of their actions.
What are they doing now to stop their harms? They're not bound to commit as much harm as possible just because government hasn't told them to knock it off, they can just, not.
If I may... a drEAk meme
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