One thing I’m confused about this post is whether constructivism, subjectivism count as realisms. The cited realists (Enoch and Parfit) are substantive realists.
I agree that substantive realists are a minority in the rationality community, but not that constructivists + subjectivists + substantive realists are a minority.
There’s a sense in which debates over the concept “perception” are purely conceptual, but they’re not just a matter of using a different word. This is what I was getting at by cognitive qualia: conceptual debates can shape how you experience the world.