The way i read the parent post, is that the uk decided to invest in other things than military. As a result they are at the whims of USA foreign policy and can't really do much about it. In an alternate world where UK spent more on hard power, they might not be subject to the whims of america to the same extent.

[To be clear, i dont 100% agree with this argument. I think there is a little truth to it but also things are much more complicated than that and it ignores the geopolitical tension in the region that was going to explode one way or another even without usa]