Seems fairly uncontroversial to me, but that's likely because it stays far-mode. If you get specific and near-mode, I suspect you'll stir up some disagreement. Leave aside which beliefs you'd rather other people have or not have - that's a separate dark arts topic. For your own goal-achievement-ability, which true beliefs are you better off not having?

I completely agree that I have limited resources and need to prioritize which beliefs are important enough to spend resources on. I far less agree that true beliefs (in the paying rent sense of the word, those which have correct conditional probability assignments to your potential actions) ever have negative value.