Because of the vast majority of goods easily available on this trade route.
The national government wasn’t able to tax the states leaving them without money, they count draft an army, leaving them with no power, etc. The flaws in the articles can be seen in Shay’s Rebellion when the farmers took over an arsenal and rebelled and the national government had no army to stop them so states had to rely on militias which was not effective.
The reasons art these:
1. they created a structured system of state and federal courts.
2. made available the basic means of collecting taxes and producing money.
3. they find solutions to the boundary disputes with Great Britain and Spain.
4. they created a structured way for settling and ruling the western territories.
