People here usually value having true beliefs for their own sake. It's hard to imagine convincing someone of the efficacy of NGDP futures targeting or humanitarian military intervention is actually more useless than convincing someone of the Many Worlds interpretation of quantum mechanics or Bayesian epistemology. There is no shortage of Less Wrong discussions involving people trying to persuade others to hold beliefs that will have no impact on the world and I don't think that criteria is diagnostic of whether or not a discussion should take place on Less Wrong.