I have no desire to cut meat. We used to cut our own deer and elk. And, that was fine. It is much like shoeing horses. I know I don't have the back for it.
I Love fat on a Prime Rib. I call it "Meat butter". When I looked at the pictures, I would of chosen the prime grade. My opinion is marbling is ok, select bulls for less exterior fat. Hard to find, but they exist.