i believe the Rambam was addressing the question about the supposed conflict between free will and Daas Hashem (the fact that Hashem knows what will happen)
i dont know his exact approach but it was explained to me something like this:
Q: it is not possible for me to reconcile free will with Daas Hashem. this is an unresolvable paradox and it really bothers me.
A: does the conflict between free will and Salvanism bother you as well? Do you find a paradox there?
Q: of course not, i have no idea what Salvanism is!
A: and you think you understand the Mind of Hashem, His Daas?