It may seem that way but just because people keep blowing holes in your BS claims.
Where O where would those ships come from? How in the world could they possibly have shipping into their ports without US ships or their own ships?
Well they wouldn't come from the South, that's for sure. No financing, no expertise, no existing shipyards. So the only alternative would be to allow foreign companies to take over coastal shipping from U.S. lines. So how is that better?
Oh, so you can figure things out! I was beginning to wonder.
How is that better? Well it's horrible for the North. It would have been economically devastating on their shipping industry as well as other industries in the North. It's really good for the South though, because the shippers can't gouge them anymore.
You probably forgot or refused to accept it when it was first explained to you, but when the Law sets forth penalties for using foreign ships, (up to and including confiscation of the ship and cargo) The gouging domestic industry sets their prices just barely below the cost of doing business with Foreign ships or crews and the cost of paying all the fines.
So yeah, the Shipping charges would suddenly have gotten way cheaper for the Southern states than they had previously been. That's why Washington DC was *IN* the protection game in the first place. To protect Northern industries, including shipping.
Again, not about slavery. The Corwin amendment proves DC and the North would sell the slaves down the river on a moment's notice, but what they absolutely would not tolerate is the loss of their revenue streams.
War was about money. Only money. Well power too, so okay, money and power. Same as every other war ever fought in history.