“Dead dinosaurs have awfully big bones with lots of tasty stuff inside just waiting to get eaten. Big powerful jaws made those bones into good eating,”
You have it backwards. The flesh of dinosaurs was on the outside and the bones were the supporting frames with only the guts inside the ribs. Much more flesh than bones.
For a scavenger bones are the thing because the rest has usually been picked over.
but marrow is fat-rich, and has collegen, trace nutrients, and lots of stem cells. Wouldn’t that make marrow as valuable nutritionally as raw protein in a world that might not have had many fatty dinosaurs?