While LL is probably onto something with the hostile attitude towards anglers, perhaps the fish species we have and rely on are hostile to mega-fishing.

Anadromous fish require intact freshwater ecosystems. How many of these have we compromised, lowering the productivity/capacity? We could make more extensive use of hatcheries but that would require the same clean water, land, and food.

Rockfish are very long lived and probably way less supportive of large annual extractions. We could fish them sustainably at low rates; would that bring tourists?

Are the primary target fishes in the Atlantic and Gulf high productivity, short-lived? Plus, they have had quite a few issues with overfishing and pollution too. Just look at east coast Stripers. And, they haven't done well with Atlantic Salmon.

We here in the PNW may not have the species and stocks that can support huge fisheries. Not saying we can't make shifts in who catches them but the ocean just might be limitless.