There's a lot of BS in most fields. The problem with philosophy is that it has no criterion for separating the wheat from the chaff. All other fields have some kind of external forcing function. In science, its experimental data. In the arts, it's the ability to produce novelty or exhibit skill or attract an audience. In philosophy there is no external forcing function. The only thing that makes a great philosopher is other philosophers saying they are great philosophers.

There are definitely some non-BS philosophers, like Dan Dennett and Tim Maudlin. But really they are more like scientists than philosophers. In Maudlin's case, he's really a physicist, he just happens to work in a philosophy department.