As far as being concerned with what jews believed in, the rambams Moreh, hilchos deos, and shemoneh prakim are full of exactly what he held a jew should believe, and the consequences of not doing so, i.e. apikorsus. The rambam held that corporealism, even unintentionally, disqualifies one from olam haba. Clearly he cared and held that Hashem cares about what we ordinary Jews have in our heads. Some of us may have brains rhat are a rishus harabim, but that’s not the way it’s supposed to be.
