More important than my field not being philosophy anymore (though I have two degrees in philosophy, and identify as a philosopher) the question you could have asked there is why would you want a philosophical audience to begin with? Seems to me there is more low hanging fruits in nearly any other area in terms of people who could become EAs. Philosophers have an easier time doing that, but attracting the top people in econ, literature, visual arts and others who may enjoy reading the occasional public science books is much less replaceable.
More important than my field not being philosophy anymore (though I have two degrees in philosophy, and identify as a philosopher) the question you could have asked there is why would you want a philosophical audience to begin with? Seems to me there is more low hanging fruits in nearly any other area in terms of people who could become EAs. Philosophers have an easier time doing that, but attracting the top people in econ, literature, visual arts and others who may enjoy reading the occasional public science books is much less replaceable.