(And, trust me, brains have found a whole lot of the bad ones. What do you expect, when you run programs that screwed themselves into existence on computers made of meat?)

Fairly flippant for what's supposed to be a primer.

The rationality of Rationality: AI to Zombies isn't about using cold logic to choose what to care about. Reasoning well has little to do with what you're reasoning towards. If your goal is to enjoy life to the fullest and love without restraint, then better reasoning (while hot or cold, while rushed or relaxed) will help you do so. But if your goal is to annihilate as many puppies as possible, then this-kind-of-rationality will also help you annihilate more puppies.

This seems like bad salesmanship. There's no need to say things like "rationality is compatible with puppy annihilation" in a paragraph that's supposed to be reassuring people rationality is not immoral or hostile to human emotions. Instead, I would say you should to the opposite, and tell people that if they really love someone, that means that it is actually a rational thing to want to make sacrifices for them, because if you weigh everything up their happiness matters more to you than their own.

So, whereas the message of this post can be summarized as "rationality is neutral", I think the post's message should be closer to "rationality is good - it lets you do things like love EVEN BETTER".