It's not about having the power to eject the US. It's about whether or not it sets off alarm bells in DC. If some small unimportant country in Africa wants to end military cooperation with the US, the US will follow the law because it doesn't matter. If a country like Japan, Korea, or Saudi Arabia signals that it wishes to leave the US orbit and enter China's orbit, that will set off huge alams bells in DC. The terms, "concerned about the democratic situation" will start to pop up in US media regarding that country and the US will resort to sanctions, assassinations, color revolutions, election-rigging, etc... to stop it from happening.
To the US government, when the cards are stacked and the stakes are high, a "sovereign government" is one that sides with America and a "tryanny that no longer represents the will of the people" is one that opts to leave America's orbit (particularly towards China's). America has absolutely no respect at all for Japan or Korea; they might be powerful countries compared to the global average but they're small potatoes compared to the US. They're either going to stay America's stooges or they become America's enemies and they can't afford to become America's enemies.
Mohamed Bin Salman is sick of America's shit; but he's still not going to join BRICS and he's still going to play along with the Petro dollar. He can sign more deals with China because that's salami slicing that the US can tolerate but if he plays power moves to China's tune like ending the Petro dollar and joining BRICs, the US will make him one offer behind closed doors that he can't refuse and that's to know his place or end up like Saddam Hussein.