Regarding Occam's razor, I don't find your dichotomy useful. That isn't to say the way you break it down doesn't have value or is wrong. Don't worry, my agreeing with it or not shouldn't affect the utility of your version for you at all. True things aren't affected by popularity in the slightest.

Expand your intended meaning for 'immutable factors'. So far I disagree, but perhaps if you elaborate it I can understand in what sense it is true in the way you are using it.