I wouldn't expect philosophy of science to be of much practical value to working scientists. Non-scientists, on the other hand, can benefit a great deal from rigorous analysis of the tools, methods and procedures of the sciences, if for no other reason than to dissolve some of the film of invincibility that attaches to them.
Of course there are as many quacks doing philosophy of science as there are doing science proper, so choice of texts is important. You can't condemn all philosophy of science based on a handful of publications (note the selection bias in the article) any more than you can condemn all science based on, say, the MMR vaccine controversy[1].
1. And while we're on the subject of hoaxes, let's just put the whole Sokal affair to bed, shall we? Social Text was an insignificant and unrefereed journal, but even if Sokal had managed to place something in The Philosophical Review, that wouldn't have, as the author put it, "exposed the astonishing intellectual fraud if [sic] postmodernism." Unless the significant number of even more damaging hoaxes perpetrated on science journals have exposed the astonishing intellectual fraud of science?