Yes, why do people keep going on about "would you eat animal foods if your life depended on it" and "what if you found yourself on a deserted island and had to eat fish to survive?"
Ummm....yes I would eat animal foods if my life depended on it! I would even try fishing but am not at all sure of my skills in that area. I caught a crab once, or maybe it would be fairer to say the crab caught me!
Standard emergency planning, suitable for hurricanes, earthquakes and desert islands.....
You do the best you can, in the circumstances you find yourself, with the resources you have available to you at the time.
So that's what I say to people now when they start on that old thorny chestnut.