Ahh, I see.. I thought you were saying he didn't speak the 10 commandments - Your argument is with 'shouted' itself - that is mine. He was atop the mountain 'speaking' amidst trumpeting and thundering... down into the valley where all of Israel was assembled, Is that better?
The point being that the ten were transmitted directly from the mouth of YHWH. And that the people could not bear His voice. The rest of Torah was (for that reason) transmitted through Moses. Even so, they are a body of work - there is nothing I can see which separates the ten from the rest. Rather, the BIG TWO are a summary of the TEN, and the TEN are a summary of the rest.
Now who has "normalcy bias"? One is a spiritual Law. The other concerned itself with material things - meats, drinks, sacrifices and washings. Even following it down to the last jot and tittle was in vain for Heb. 8:19 tells us it made nothing perfect. It has no bearing on salvation whatsoever. Again, look at it from Gods viewpoint. You won't have an earthly body in Heaven. No real need for food to sustain you. No real need for washings because of the lack of bacteria that couldn't affect your spiritual body anyways. The spiritual Law is forever. The other . . not so much. Eph 2:15, Col. 2:14