This book makes the argument that (paraphrased, and put into LW terms) most philosophy is uninteresting because their curiosity doesn't seek to annihilate itself. Instead of asking "how can we actually improve our knowledge?" they bicker over the definition of JTB.

The tools and insights of philosophy can be useful when you try to answer the practical questions, but most controversial topics are controversial because there are a lot of wrong ideas there, not because it's a hot new empirical question (Higgs: does it exist? If so, how big is it?).