Now, I find this confusing. If you're having trouble writing, the last thing you need is another book, competing for your attention.

Your confusion is due to problems in your map of human behavioural patterns, not due to an incongruous explanation of the motivations for MoR. The discussions surrounding MoR give a powerful status reward, associating writing with social success. That is one of the most powerful forms of behavioural reinforcement, and something I have exploited myself at times.