Platonism and Platonic Law

According to the Rabbi’s method of ruling autonomously, does this mean that there is no Platonic halakha and therefore there is no point in aiming for it and therefore everyone will do what they understand, or is there a halakha and yet the value of ruling autonomously outweighs the value of reaching it (even though Plato sits in heaven and says no no no to us)?
In Prof. Shalom Rosenberg’s book, he provides a review of the methods on the question of whether Halacha (and tradition) is Platonic or constructivist. I wonder what the rabbi thinks.
A related question, according to the method of Platonism, are all things necessarily Platonic or can there be things that are not so?
thanks