This approach does not beat the conundrum of cultural relativism. Any theory is semiotic, a system of meanings, and meanings come from cultures. The goal of Generative Realism is not to say what is True with a capital T, but to extend the standard conceptualization of mind and reality held in my culture, while holding the cultural arbitrariness to as small a conceptual space as possible. I think so. We have history, or rather, multiple histories, for that very purpose.
All history is just somebody's interpretation of what happened.
But there are lots of different interpretations. First, if you did that, it would just be your interpretation anyway. Philosophy, and discourse, are conceptualizations of experience. If we are to have any discourse at all, we are going to have it using the terms of our conceptualizations of experience. We made it up.