Dear Haleivi,
I think your also overstating the opinion of R Moshe Taku. He is merely saying that since the prophets etc. had physical references to Hashem, there cannot be a prohibition me saying that God is corporeal. The idea is that knowledge of God is not an on it’s own merits obligation.
This is a deep struggle in Maimonidean thought. Can you show me where the Rambam says, that one must think or accept the Ikkarim? (Of course you can find where does not say that one does not have to.) These topics do not work with rov poskim or even accepted thought. They have to be really studied, just to know the basic implications. So the question is, what would the Rambam say to Taku? Or, would he even respond? Is it relevant?