I don't really understand what point you're trying to make, w/r/t the post you're replying to.
Again:
A family might feed themselves through a combination of any or all of: hunting, trapping, fishing, foraging for wild edibles, home gardening, AND buying from whatever is available on the market.
I'm saying that hunting, etc. are individuals components of a broader strategy for providing food - not that any one of those things is sufficient in and of itself. As as of today, it doesn't appear to me that the commercial market for food is going to just disappear overnight. But if things devolve to the point that you can't buy everything you need, then some of these other approaches can come into play.
Seafood - that sounds like continuing to rely upon the food supply line (fishing boats and their supply chain).
There isn't just one "food supply line." The supply chain for the steak you buy at Food Lion involves a lot of intermediate steps and processing. And those are exactly the steps where we've heard news reports of the processing plants closing down, etc.
My point about seafood is that there are fewer such intermediate steps involved. A boat comes in, docks, and sells their shrimp to the seafood house, and the seafood house sells to the public. The main processing is weighing. And some boat captains even bypass the "sell to the seafood house" part and sell direct.