So you're agreeing that external demand hasn't changed one iota
In your example, it was 90 before signing an agreement with Iraq and it's 90 after signing an agreement with Iraq.
The difference is *who makes money* in the different arrangements.
- When they buy barrels, the guys pumping out the oil make a chunk (ie: Exxon[us]), and so does the country providing the goods (Iraq, Venezuela, Saudi Arabia, etc).
- When they pump their own, the only one making money is the country providing the goods (Iraq, Venezuela, Saudi Arabia, etc).
The second arrangement has many benefits for them. It's not only removing a middle-man, but also allows them to potentially negotiate in non-US currency for the goods.
There's simply no scenario with the second arrangement where we benefit at all. The closest you could argue is that it's neutral. It doesn't hurt us but it doesn't benefit us either.