I’m scratching my head.
It sounds like the researchers saved the bones with skin- and meat- on them. And then removed and threw away everything but the bone and marrow.
I don’t think our ancestors could bring themselves to throw away all that jerky.
Though maybe saving the meat, by slicing it so it could dry perhaps,may have allowed the marrow to spoil.
The researchers weren't trying to prepare food, they were testing to see if they had the right idea about why the remains were in such a condition.