A common question here is how the LW community can grow more rapidly. Another is why seemingly rational people choose not to participate.

I've read all of HPMOR and some of the sequences, attended a couple of meetups, am signed up for cryonics, and post here occasionally. But, that's as far as I go. In this post, I try to clearly explain why I don't participate more and why some of my friends don't participate at all and have warned me not to participate further.

Rationality doesn't guarantee correctness. Given some data, rational thinking can get to the facts accurately, i.e. say what "is". But, deciding what to do in the real world requires non-rational value judgments to make any "should" statements. (Or, you could not believe in free will. But most LWers don't live like that.) Additionally, huge errors are possible when reasoning beyond limited data. Many LWers seem to assume that being as rational as possible will solve all their life problems. It usually won't; instead, a better choice is to find more real-world data about outcomes for different life paths, pick a path (quickly, given the time cost of reflecting), and get on with getting things done. When making a trip by car, it's not worth spending 25% of your time planning to shave off 5% of your time driving. In other words, LW tends to conflate rationality and intelligence.
In particular, AI risk is overstated There are a bunch of existential threats (asteroids, nukes, pollution, unknown unknowns, etc.). It's not at all clear if general AI is a significant threat. It's also highly doubtful that the best way to address this threat is writing speculative research papers, because I have found in my work as an engineer that untested theories are usually wrong for unexpected reasons, and it's necessary to build and test prototypes in the real world. My strong suspicion is that the best way to reduce existential risk is to build (non-nanotech) self-replicating robots using existing technology and online ordering of materials, and use the surplus income generated to brute-force research problems, but I don't know enough about manufacturing automation to be sure.
LW has a cult-like social structure. The LW meetups (or, the ones I experienced) are very open to new people. Learning the keywords and some of the cached thoughts for the LW community results in a bunch of new friends and

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