Let me help you with that, here's the bottom line from my post #340:
And you disagree, why, exactly?
Your statement above is based on what happened, rather than what would have happened had they been left alone. Of course when you use warships to stop other people's ability to trade, it's going to seriously damage their economy, while those same warships interdicting their trade and directing it to your ports will boost your own economy.
But it misses the point. You can't claim their plan was flawed based on your side's deliberate interference with their plan.
This reminds me of the people saying Chris McDaniel was a bad candidate, while ignoring the fact that the Rino/Establishment deliberately torpedoed him.