If you'd watched the film, Sandra, you'd realise there's a lot of truth in your argument - so far as it goes
! Eskimos get a lot of their B-17 from Caribou which naturally feed on B-17 rich plants. So if you can find a steak from an Angus cow that's been fed on B-17 rich grasses, you might be onto a winner. Unfortunately, most commercially farmed cattle are fed 'scientifically balanced' diets in which the B-17 is lost.
One of the main arguments in favour of adding b-17 to the diet is that all mammals, especially primates, naturally seek out plants that are rich in B-17 even if they contain no other nutritional benefits. It could explain why wild animals never die naturally of cancer.
Gill