That’s like saying US is French stooge because the French trained Americans with their system during the American Revolution, and despite fighting the French shortly after in the Quasi War.
You still have not answered on what possibly the precise mechanism by which US manipulate ROK. For the sake of the argument that a system being modeled after another country’s is sign of being pressured, how does this explain ROK’s stalling to have wartime control of their army, while the US has expressed frustration with the delay?