What about the NATO requirement to spend 2% of GDP on defense? Isn't it strategic for the US to spend disproportionately more on the military to support allies'

What about the NATO requirement to spend 2% of GDP on defense? Isn't it strategic for the US to spend disproportionately more on the military to support allies' militaries (e.g., South Korea) and prevent the rise of competing superpowers? https://www.nato.int/cps/en/natohq/topics_67655.htm https://www.nato.int/cps/en/natohq/topics_67655.htm