I generally agree with this, but how he wrote about it was different. You're kind of smoothing over all the bumps in his argument.Of course, but Nietzsche was interested in morals above all else, that's why he thinks about psycological or ethical, or sociological (I mean, all things related to human behaviour) as the superior kind of knowledge. This is because he was interested in becoming immune to social condiotioning, so gaining a deep knowledge about these things was crucial.