Thanks! Zog!! I had no idea how to reply to his question. I sent him a letter as follows.
I had thought about it for a while...
My interpretation is secular one, allow me to express it!
I think people wouldn't start eating meat until it reached a sustainable numbers. Today we don't normally eat meat as a result of casual hunting, but through domestication. Animal meat is served through planned slaughtering from a stored pool of livestock evading extinction of precious source of protein.
The point is God gave us permission to make the most of animal as the source of nutrition, so we have to manage the privilege carefully enough.
My reply was not secular!
Today we take it for granted that we eat animal meat in our daily dietary, but there's a history for everything.