People's ideas about how humans should live together can be beneficial for the wealth and well-being of whole societies and its members. Was Rousseau part of basic or applied science?
We can wonder about how useful certain efforts are, of course, especially in all their extent; but I don't know how wise it is to dismiss things _wholesale_, just because their application is not immediately apparent and the rejection fits into the political current. The unnecessary snark is just sad to see here.