You talk about cooking meat, but we still have enzymes in our stomachs (e.g. pepsinogen) that only digest L-peptide chains. As a predator, you do not digest D-peptide chains.
- It is analagous to eating raw grass.
- It is not analgous to eating processed/cooked grains, hence it is non-sequitur.
- It is a matter of biochemistry, not culinary arts.
I gave the original speculation as an example of there being too much speculation around abiogenesis and evolution. This discussion proves it.