1) There are diminishing returns on talking about improving rationality.
2) Becoming more rational could make you spend less time online, including on LessWrong. (The time you would have spent in the past writing beautiful and highly upvoted blog articles is now spent making money or doing science.) Note: This argument is not true if building a stronger rationalist community would generate more good than whatever you are doing alone instead. However, there may be a problem with capturing the generated value. (Eliezer indirectly gets paid for having published on LessWrong. But most of the others don't.)
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.