I found the Prime Directive to be one of the hardest lessons in consequentialism. If it existed in the real world, we would not have many of the current problems in the developing world, where people slaughter each other using modern weapons instead of spears and bows. And they coordinate the slaughter using modern tech, too. And the radicalization of Islam has been caused in part by the Western ideas of decompartmentalization. Exploiting poorer nations and depleting their natural resources doesn't help much, either. The so-called foreign aid does more harm than good, too. If only Europeans had enough sense to refrain from saving the savages until they are ready.
If it existed in the real world, we would not have many of the current problems in the developing world, where people slaughter each other using modern weapons instead of spears and bows.
I am still not convinced that in the parallel reality the life would be better. Why exactly is being killed by a gun worse than being killed by a spear?
Disclaimer: I am not a philosopher, so this post will likely seem amateurish to the subject matter experts.
LW is big on consequentialism, utilitarianism and other quantifiable ethics one can potentially program into a computer to make it provably friendly. However, I posit that most of us intuitively use virtue ethics, and not deontology or consequentialism. In other words, when judging one's actions we intuitively value the person's motivations over the rules they follow or the consequences of said actions. We may reevaluate our judgment later, based on laws and/or actual or expected usefulness, but the initial impulse still remains, even if overridden. To quote Casimir de Montrond, "Mistrust first impulses; they are nearly always good" (the quote is usually misattributed to Talleyrand).
Some examples:
I am not sure how to classify religious fanaticism (or other bigotry), but it seems to require a heavy dose of virtue ethics (feeling righteous), in addition to following the (deontological) tenets of whichever belief, with some consequentialism (for the greater good) mixed in.
When I try to introspect my own moral decisions (like whether to tell the truth, or to cheat on a test, or to drive over the speed limit), I can usually find a grain of virtue ethics inside. It might be followed or overridden, sometimes habitually, but it is always there. Can you?