Yeah, and if the Soviets withheld aid from the North Vietnamese, you can bet that the North Vietnamese would end up suffering the exact same situation. In fact, we got something similar in Afghanistan when the Soviets withdrew.
Even if the ARVN WERE dependent on us, the North Vietnamese were dependent on the Chicoms and Soviets as well. Heck, in a way, WE were dependent on the French as well. By your logic, we don’t even deserve to exist as a country precisely BECAUSE we got aid to get where we are today rather than truly lacking any help in our efforts for independence.