One thing to gain from rationality, apart from what you mentioned, is a firmer understanding (and real belief) in reductionism. This can apply to pretty much anything, and I think for me contributed to a new understanding of consciousness. On the topic of how it has lead me to realize I was wrong about something, it’s helped by tons of times. Sometimes I’ll find myself in an argument resisting what the other person has to say and then I notice how silly that is and I consider whether I need to update. I’ve changed my mind about a number of mostly trivial things in this manner. Rationality (and less wrong in particular) helped me understand that winning an argument by stubbornly remaining wrong isn’t really winning, and that has benefited me greatly. It can also help us be more strategic, and I think I’ve become a bit better at planning. I know some of this might not answer your question exactly, but it’s a mainly response to your title.
One thing to gain from rationality, apart from what you mentioned, is a firmer understanding (and real belief) in reductionism. This can apply to pretty much anything, and I think for me contributed to a new understanding of consciousness. On the topic of how it has lead me to realize I was wrong about something, it’s helped by tons of times. Sometimes I’ll find myself in an argument resisting what the other person has to say and then I notice how silly that is and I consider whether I need to update. I’ve changed my mind about a number of mostly trivial things in this manner. Rationality (and less wrong in particular) helped me understand that winning an argument by stubbornly remaining wrong isn’t really winning, and that has benefited me greatly. It can also help us be more strategic, and I think I’ve become a bit better at planning. I know some of this might not answer your question exactly, but it’s a mainly response to your title.