There's a lot less fish now than there were 100, 500 or 10000 years ago.
Of course, by your criteria, the most knowledgeable fishermen of all are those who have never even seen the sea, but are successful middlemen who manipulate credit, markets and investments to increase fish catches and sales and encourage wasteful harvesting. They are very financially successful, so by your definition, they are the most efficient. And when the fish become too scarce to catch they simply move on to something else, leaving resource devastation and economic ruin in their wake. You never seem to object to that form of regulation.